I was on loestrin birth control for 2 weeks. I had unprotected sex, and he finished in me. I took my pill late the next day and started spotting. I took my pill for 2 more days (a total of 3 days after we had sex), but since I was still spotting, I just decided to stop taking the pill and have my period. Is it possible that I could be pregnant? My period was very light. It's been 2 1/2 weeks since we had unprotected sex, and my breasts are sore, and I've felt nauseous for a couple days off and on. If I bled, was it possible that it was caused by taking my pill late and I still could have gotten pregnant? Is a pill of 10mcg even effective after 2 weeks? Help!