<human>: Can you provide a brief overview of the text?

Hello,
I have had issues with my stomach hurting for a very long time (minimum 4 years). I can be starving and my stomach will hurt, feel bloated, and feel full at the same time. Then, as soon as I eat food, no matter how little it seems, I feel stuffed. Even if I stop eating after a small amount, I begin to feel stuffed and my stomach still hurts. Soon after I stop though, I will quickly begin to feel hungry once again. I do make sure to chew my food, eat slowly, and drink water. I also make sure not eat late at night. I stop around 6-7. However, after waking up in the morning after 10-12 hours of not eating I still feel not hungry/stuffed/bloated.

My weight additionally changes like crazy. I can gain up to 3 lbs in one day. I've tracked how much I eat by writing it down and the amounts don't add up. To me, it feel like my digestive system is very slow and I simply don't digest the food so it just sits there.

I have tried exercising but exersize does not impact any weight loss or digestion any more than if I simply ate the same amount food as I did during the period of time while I was exersizing. In fact, it seems to promote weight gain more than anything. 

I do not have any known allergies, chronic illnesses, intolerance, or major injuries. I did however have issues with being made to eat foods when I wasn't hungry when I was much younger. For some period of time I was anorexic (about 1 year) and refused to even drink much water. I only have a problem with my stomach. My legs are actually in really good shape, and then my stomach literally sticks out like a sore thumb. Thank you for reading. Even if you are not a medical professional, any advice or thoughts would be appreciated. I'm happy to answer any questions for further information.
<bot>: I have constant stomachache and bloating. I can't eat any normal amounts of food and seem to have the weakest digestive system ever.