Why does this happen and has it happened to any1 else, if so howd it work out?

well ive had headaches, constipated then the total opposite, feelin sick at night but not getting sick, heartburn, peeing alot, slightly dizzy and also an odd feelin in lower belly. yeah i no sounds like pregnancy. but im on the pill, had my breakthrough bleeding and its to early to test. so whats the chances i am??