Not pregnant... Need answers

Shea • Karate instructor.... Getting black belt 12/6/14 just an overall fun person
So for the last three months I've thrown up every morning at the exact same time if I don't take Dramamine (OTC motion sickness medication) and the doctors can't figure it out.... Any suggestions? I'm just so tired of feeling so yucky all the time and it makes my back hurt and my abs hurt and then I don't want to do anything. NOT PREGNANT (doctors ran a test)