Congratulations! Living the life right now--I turned 40 in Feb., and as you can see by my sig., the baby just turned one (and is into EVERYTHING!). The first 2 are 21 months apart--DD is almost 9 and DS is 7--so we never thought we'd have trouble having a third. We'd pretty much given up, when lo and behold! But Celeste is just the love of our lives--everyone, we're just nuts about her.
Because I was "older", I went into the pregnancy thinking, I have to make sure I take care of myself. Fortunately, Buzz was in all-day K (he started literally the day before I took the pregnancy test!), and I'm home full time, so I took a nap every day and also a walk. I opted not to have any of the testing done, jsut had regular ultrasounds, but told the doctor that if anything weird showed up, I would get more tests (not morally opposed, but you know there's a chance of problems, and after our long wait, we knew we weren't going to change our minds). It ended up being my easiest pregnancy! The only problem with that was, I was induced with the first two, and was doing so well, the doctor wanted me to go natural, and I was just paranoid that I would go into labor at home with Belle as my midwife (she could have done it, too, she was reading our EMT books and every adult pregnancy book in the house, knew what an episiotomy was, you name it--it was cute). Fortunately, I went into labor late afternoon with DH home, but we still barely made it to the hospital and the doctor missed the delivery. But, that's the least of my worries, she came out fine.
You're going to do fine, you're probably still in shock. I was amazed at how much baby products had changed in 6 years. Enjoy the pregnancy--it's such a magical time!