Food Issues

I feel like I ate a really big lunch, but it is 90 minutes later, and I feel hungry or thirsty. 

I have been having some sort of pain or discomfort, which feels like inflammation (it is periodic, it involves swelling) in my gastrointestinal track, mostly my stomach. It is sort of like a gallbladder attack, but not exactly like I've had them before. Certainly not as painful in any way! (I can still function relatively normally through these episodes.) These episodes seem to somehow be related to my food intake, and eating what I call "sensibly" seems to keep them in check. So the obvious solution is to eat sensibly, but I am not a person who has a longterm, great relationship with eating sensibly. And while I'm figuring this out, I often find myself hungry, yet afraid to eat.