I am not sure if you are travelling to Disneyland,CA or DisneyWorld, Florida? Last October my family and I went to Disneyland and I was not feeling well also. I was so worried I was going to wreck the trip for everyone, fortunately it turned out great and I managed OK.
I just wanted to let you know what I did that helped tremendously....We pre-ordered groceries from Albertson's online and they delivered everything right to our hotel for only $10 delivery fee!! That way I had all of my comfort foods and didn't have to worry about the take out food flare!!! We will do this again for sure, the next time we go......even ordering cases of water and juice boxes and snacks for the kids was worth it right there. Cheaper than buying it inside Disney and great for the kids while they are waiting in the line ups!! I hope you find some relief and enjoy your trip! I am so jealous!!!