I'm quite scared and anxious tonight. I'm hosting a Thanksgiving dinner tomorrow and I'm really scared I or someone else will get sick and ruin the day =(

I've been eating some things with wheat in it (a little slice of pizza, a couple pumpkin muffins I made) and I'm afraid that I am going to throw up from it (I have done before, because I ate cookies with wheat in them). But I'm thinking because I'm hungry my stomach can't be upset? But I'm afraid to eat. My stomach has been hurting a bit all day but I seem to have a lot of gas today (probably from eating wheat) and I've been a wee bit constipated. My husband says if I'm hungry I won't throw up. I guess I just need a little comfort and reassurance. Trying really hard to be brave and calm about it but because it's such a big day tomorrow I'm really afraid sickness is going to mess it up =(