Bleeding

I had unprotected sex on the 3rd of december and took a plan b. I know they can cause irregular bleeding so on the 9th and just thought it was my regular period so then on the 13th i started taking birth control pills but would always forget so had to keep taking double doses. i started bleeding in the 9th of december and still haven’t stopped with no end in sight. my doctor told me that the bleeding would stop last week and it still hasn’t. I’m really starting to pissed off because i can’t even have sex with my fella. And i really really want to. Please help i’m so confused.