I need some help. Me and my husband aren't trying to have a baby right now. But I've recently got my birth control out of my arm and started the pill. I haven't been taking them because they make me sick to my stomach and the day we had sex I didn't take my pill. I started having a brown discharge and it scared me. Then it went to a full on red period. I'm not suppose to be on my yet it suppose to be another week. And I'm really cramping and my temperatures are changing . I have got flashes all throw the night. I've took pregnancy test but they come back negative. Help?