Yes I Can't Eat Because I Lost My Appetite But

Yes I can't eat because I lost my appetite but wen I do I eat something small and feel like I ate a 5 course meal then I sometimes puke it back up I feel a achy burning feeling around my belly button bout all the time and for the last 2 mounth and I went from 195 to 140 in like a week I feel lazy all the time and I'm a male so I know I'm not prego lol