Hi , My boyfriend is 17 years old . at this moment he s having sharp stomoch pain , it started this morning and it was mild , it began at the upper part of the stomoch and is slowly moving down , about an hour ago he vomitied .. the pain is really sharp although it varies , in one point he said its so sharp that he couldnt even stand up .. the pain is on the right lower side now but its not really getting worse after putting pressure on it .. what could it be ?