Something’s worrying me..stomach problem

Patient: Hi. I’m 16 years old. About 2 weeks ago, I feel full every time I eat even if it’s just a small amount of food. I went to see a doctor and he didn’t told me what the problem is, but he told me to take Domperidone twice a day (morning and evening, 30 mins. before meal) and a medicine for stomach ache (3 times a day). He told me to take those medicines in three days. I finished taking the medicines, and the next day after the taking the last one, I suddenly feel very hungry. I felt hungry the whole day. I also noticed that I still feel full easily when I eat, but it’s not as bad before. Sometimes I would feel my stomach grumbling and I feel hungry again. I also sometimes fart and burp a lot. When I eat, I feel really full, especially after drinking. Should I worry too much? Should I see a doctor? I feel scared. I hope you would be able to help me. Thank you very much.

Doctor: