has this happened to anyone before ?

I have been bleeding now for 2 weeks and it doesn't seem to be getting any lighter .. From Nov. 5th - 14th me and my boyfriend had unprotected sex and he did not pull out. On Nov. 20th my period started it was normal and ended on the 25th but on Dec. 6th i started spotting (pink), it ended on the 7th and came back on the 9th but this time it was brownish pink. It turned red on the 12th so i declared it as a period but it is now the 20th and i am still bleeding as well as cramping, I'm not on any birth control.