Hi I'm another panic-attacker!

I'm going to be very honest with you, are you ready?? Last year's trip was the highest anxiety trip I have ever had. The experience I had going through that hard time will help you (hopefully!!).
1- I was absolutely FINE in the parks. I did have one semi-episode in CoP but I was able to calm myself down pretty quickly. The hardest thing with anxiety is being really PRESENT. In the moment. Our minds race to "oh my gosh I should have done X...." or "oh my gosh what if X happens...." or "oh my gosh I'm feeling X so that must mean Y". That's what happened to me in CoP. It was right when the doors shut and Ralphie (lol) started talking. The room was hot because the door had been open so I started really freaking out. As soon as the scene changed the room cooled off, and everything was fine when I really started focusing on the show- being really present. So, that's my first piece of advice- be 'in the moment'. At the happiest place on earth, there is so much detail, so much joy. Really BE THERE, and that will give you a better experience.
2- There are some great "out of the way" spots to take a breather. We like:
MK- Rose Garden by the castle, Tomorrowland Transit Authority (it's just so chill and goes in the dark and is quiet... we LOVE it), out of the way benches at Pirates of the Caribbean.
EPCOT- Spaceship Earth (also so chill, dark and quiet), inside the courtyard of Morocco and the Moroccan art room (whatever that's called with the henna), by the fountain at France, close to the friendship boat dock at the back entrance to World Showcase, Stave Church at Norway.
DHS- Benches by Echo lake, benches by ToT, benches by American Idol
AK- Oasis Area, area behind Tree of Life, Rafiki's planet watch
3- Rent a car. This is BIG for us. I have issues with claustrophobia, and I don't like being crowded on the Disney Buses. Having a car allows me to come and go as I want, go offsite to get some groceries/snacks, and is a quiet "refuge" that quickly gets me out of the hustle and bustle. DH always drives, and I can navigate with my eyes closed now
4- Explore the resorts! I LOOOOVED watching Wishes from the Poly Beach. We weren't staying there, and that's ok!! We loved walking around the Boardwalk/Swan Dolphin at night. We loved touring the Wilderness Lodge, Poly and Grand Floridian Lobbies. We loved listening to the Grand Floridian piano player and band play (DH and I are both professional musicians). These were all quiet times and we brought snacks and just walked around and enjoyed. We were staying at Pop, and had no problems at all talking to the gate attendant and just telling him that we were there to check out the resort.
5- We did a lot of research on restaurant food, but didn't do a lot of research on restaurant ambiance. We were at Raglan Road and holy cow, it was the loudest restaurant ever. I had a panic attack in the restaurant (twice). Poor DH, he's such a trooper. I knew what I had to do though- I just got up, told DH that I had to go outside for a while because I was panicking, and did just that. I walked outside, I looked at the little gift shop outside the restaurant- took some "me time". When I felt ready, I went back in. I had to get up and leave a 2nd time, but after I came back in, DH offered to switch seats with me and I busied myself with taking pictures and planning out our day. He pulled out his iphone and we looked through pictures, played some games, etc. I couldn't eat most of my meal (too sick feeling from the panic) so DH was happy to eat mine too HAHA. I gotta say though, what I did eat was YUMMY! I have a review in my signature- I talk about my panic a little bit so feel free to browse around! When I'm in situations like that where I feel too sick to eat but know that I need to for my health, I have a trick. I don't know if this is going to help you at all, but what I do is I get out DH's iPhone or he and I start talking about something totally unrelated to our meal- like a future vacation, past vacation, what rides we want to go on, etc. Then, I take a small (tiny) bite and get my mind immediately off of it. I can normally drink water, so I tend to kind of just swallow the food like it were a pill and get my mind on something else. I also squeeze my thumbs just to have something to hold on to. Or, I'll get the food "to go" and eat it while walking somewhere else. I need that multi-tasking sometimes. I cried in 3 restaurants at WDW this last trip- Raglan Rd, The Wave, and Jiko, and it took me a while to figure out what tricks work for me to calm me down. Again, it's that whole being present thing... in restaurants I'm still trying to work on that.
6- Bring some comfort items from home. I always have the following with me: Rescue Remedy, Thieves and Di-Gize oils from Young Living, Lavender body spray by Hugo Naturals (calming scent), my iPod loaded with favorite music, games, and relaxation podcasts, hand sanitizer, a washcloth with some ice in a ziplock (if you put some cool water on your cheeks and back of neck it helps you if you're having a panic episode or if you're feeling claustrophobic), Oscillococcinum (if I start feeling a cold coming on- I love this stuff), water, snacks, hat. For the room I always bring my own blanket (travel size) and a lounge-around track suit to make sure I'm comfortable but I can also go out in it if I need to. I also will always bring ear plugs with me, too.
I hope this wasn't way too long or too much information. When I'm at WDW, I'm in my happy place. I know what tricks I need to do to keep me calm, but really, the only places I have problems with still are in restaurants, and I know how to divert that. When I'm on a ride- I'm 100% fine. You will be too.
Also, bring some
Rescue Remedy (by Bach) with you- it's FABULOUS. I love it, I swear by it... I used it this morning, actually!