Last Friday night, I had sex for the first time, and it was unprotected and I was not on the pill. The next morning I took the Ecp pill and now I've started bleeding really heavily with a sore stomach(the same feeling as period pains), But my period also finished last Friday afternoon and shouldn't be back for another month? Please help :( Do you bleed A LOT before you get pregnant? But then aren't the side effects I'm getting to soon to be pregnancy side effects?

Did not read about the pillyou took?