Everyone is different, and stomachs react in different ways. Mine is very sensitive, and if something irritates my wrap, I get diarrhea and lots of gas. Other than that, though, I don't have any problem eating, and have a great appetite.
As I said, everyone is different, and as your stomach/wrap heals, yours may say no to food. I do think most people do have a good appetite once things get feeling better.
I think you should definitely call your doctor and let him/her know what's going on with you. You need your nutrition, and he/she can help guide you towards better eating, and check to make sure everything is healing properly.
Good luck, Melissa. I hope your appetite returns quickly. It's true that hot muggy weather is enough to take anybody's appetite away!
I'm sure you'll get lots of ideas and advice from members here. Stay with us!