Plan B? In need of a gyno.

Patient: I lost my virginity on september 1st, we had unprotected sex and although I am on birth control I missed a day so I know it isn’t as effective. The following day i took Plan B, and of I’ve begun to get cramps and today found blood in my discharge, its very light not like a regular period. Did the pill work?

Symptoms: Cramping, blood in discharge. Before the blood my discharge was different, it was thin and clear and continuous. no itching or anything just different and the smell was different too but i wouldn’t say fishy.