bleeding after taking the morning after pill?

I had sex for the first time and I bled a lot but I figured this would be normal. Then I got worried I would be pregnant so I took the morning after pill within the 3 day limit while I was still spotting bc of the first time experience thing. About 2 days after I took the pill I started bleeding even more and a lot heavier. My flow has been constant and bright red since then and I haven't got any cramps or any of the PMS symptoms but it's been 9 days after I took the pill and I haven't stopped bleeding. I was wondering if this was normal or if I should go to the doctor. What's the difference between implantation bleeding and normal period bleeding? My period wasn't due until 2 weeks and I don't know if this is my period or not. I read somewhere that the pill makes you period come early or late but I am not sure. I am only 17 pleeease help.