Ever since I took plan b the second time my periods have not gotten back on track. I finally started the birth control pill a little under two weeks ago. I've had the basic symptoms of it. Tender breasts, mood changes, headaches, to name a few. My period came a day early than it was suppose to and I was okay with that. However, it's been a week since my period and today I didn't feel right. Something was wrong and I didn't know what it could be. I had sex yesterday. (May 3rd) Today I had basic period cramps and didn't understand why. Later when I used the bathroom I noticed I got my period... A week after my last one. I'm going to call the doctor tomorrow but I wanted to know if any of you ladies had a clue on what's happening? It doesn't make sense to me. Could anyone help me out?