I started using birth control at the beginning of July. 2 weeks into August I stopped. I had a normal period on August 5th for 7 days. A normal period. Then on the 19th I bled for about 4 days, I figured it was a bled out from stopping my pack. Since then (today's Septemeber 14th ) I haven't had a period. I've been cramping for about 2 weeks, but nothing. I've had headaches, I've been tired... am I pregnant?