question: Why does my stomach and back hurt? I feel tired, sluggish, nauseated and get headaches. I feel like I can t eat at times. I have been using the birth control patch faithfully... I had a baby ten months ago and I am experiencing the same symptoms I had when I first got pregnant. I took a pregnancy test and it came back negative. Maybe it could be to early to detect? But if not pregnancy what else could possibly be going on?