I think i see myself wrong. think my stomach's growing but it's not? am i crazy?

Not crazy, but...: If you were suffering from major mental illness, you wouldn't ask but would simply believe that you're right and everybody else is wrong. There are all sorts of variants on disordered ways in which we see our bodies (i spend time in gyms so believe me i know), and this might be worth talking about with someone who can teach you tricks to defeat these irrational thoughts. Your dr. Can guide you.