I am so sorry to hear of your loss. I have been there, I had 6 misscarriages. It is one of the hardest things to go through.
I also had to tell my 4 year (DS) that I had lost a baby. Just something to think about. After I told my DS he started acting out, misbehaving, not being himself. It took me a while to figure it out. He had gotten it in his mind that I did not want the baby and that I made it go away. It is so hard at this age. If you find your little one acting out, that maybe the problem. After I sat down and told my DS that I really wanted the baby and it was not my fault, it was easier on him.
My thoughts are with you and your family. I agree with everyone here, go to Disney. Spend time with your family, they need that more than you know. And keep an eye on your husband. People tend to forget the husband when this happens. My DH broke down the first time someone asked how he was doing. No one thought to ask if he was ok.
Please feel free to PM me if you would like to talk. I understand what you are going through.