What heals my stomach?

On Monday I ate tuna salad the next day my stomach was acting up.. I threw up and my brother who is a med student told me to take a pregnancy test well it showed negative and I had my period two weeks ago. ..

My stomach has been bad since , no throwing up but just pain in the abdominal area in the middle of my stomach... and nausia.. not like I want to throw up nauasia but like th e feeling if you have had cofffe and your stomach is going bad.

It doesn't hurt when I eat only after... heelp
Updates
+1 y
Oh and I am constipated
What heals my stomach?
Post Opinion