jay8903

Hi everyone. I'm a 19 y/o male and I've been having a few digestive problems for the last couple of months. All this started when one day I suddenly felt pretty weak, had headaches and couldn't eat anything. Firstly, I've been belching quite a lot especially immediately after eating. My throat often feels tight although that problem seems to be receding. I went to see a doctor who asked me if I had symptoms like vomiting/loss of appetite which I didn't so he gave me some medicines after checking my stomach for lumps. After taking the medicine for 10 days(I've stopped taking them for about three days) I'm still belching a lot and there has been change in my bowel movements lately. I've been going twice a day for a while now(Before I started taking the medicines it was usually once a day). Also, my stools are loose with undigested bits of food(vegetables generally).

Also I think I should mention that I live at my university's campus and I eat out very often.
Does anyone know what could be causing all these symptoms and what measures I could take to feel better?