I've been on birth control for about 7months now & I was on my sugar pills this past week 6/9-6/15 and got my period on the fourth sugar pill. I had a very short period that was done by Friday(3days). Me and my boyfriend had unprotected sex about 4 times the next day on Saturday. He didn't finish inside me only once or twice. I started my new birth control pack yesterday (Sunday) and woke up feeling nauseated and stomach pains. Today right before I took my second pill at 10pm my stomach was hurting in different areas, cramps and lower back pain. Could i be pregnant? Maybe its way to early to tell. We are worried that something could be up or it's just the pill working again or something.