Hey!

About 2 days ago I suddenly started to feel a uncomfortable feeling in my abdomen. The feeling can be felt above my belly button, a few inches to the right. It doens't hurt, but its very unconfortable. If I lay down on my stomach it kinda goes away, and it comes back if I start walking. Sometimes its more intense, and sometimes more non-intense. It doesn't hurt unless I push really hard. Also, if I eat something, my stomach hurts afterwards even more. What could this be? Cancer? I'm male and 17 years old. Some other symptoms: loss of apetite, some nausea sometimes, and thats pretty much it.