For the past 5 to six months I have been experiencing random vomiting accompanied by severe stomach pains. I always feel fine afterwards and inbetween the day's that I am not having this experience. I have been tested for pregnancy, sexually transmitted diseases, and pendasitis. Everything comes back negative. the pain that I get before throwing up in my stomach is alway's in the same area, and is sometimes accompanied by a headache (not always). I am considered to be healthy= eating right, working out, not smoking and I get sleep. It has reached a point that I am convinced that something is wrong with me, but I cannot seem to find out what. What are some possibilities that you think?