Earlier this month I took plan b after the condom broke. The 15th (Wednesday) my period started (a week early) the day after my period ended (Thursday the 23rd) I started taking the pill. my doctor said just to be sure because my period was early and I started taking the pill after my period ended she wants me to wait until my next period to use the pill as my only form of birth control. I wanted to know if anyone could figure out how soon the pills would work for me. I'm waiting until my next period to be sure. But I'd still like to know.