Birth control pill help!!!?

Best to finish it because otherwise you could get spotting or irregular bleeding. But if you really can't stand it, it's safe to finish it mid-cycle, just as long as you haven't had in the week before (because then you could get pregnant). If you are switching though - and you could try another type and see if you don't get side effects - then wait until the end and then start the new pack of the new one. You should go back to your doctor and ask for another one. Not all women get the same side effects on them all.