Could i be pregnant?

i was raped and the subsequent day 21 hours next i took plan b at the hospital. a week later i get my period for 6 days. but i be reading about implantation bleeding. could i be pregnant or is it unlikely? If you took emergency contraception AND bled for 6 days, next the chances of pregnancy are rather infinitesimal.
Implantation bleeding -- IF it happens -- is normally quite night light, so much so that it often go unnoticed.
It seems unlikely- if you took the morning after pill AND bled for 6 days, it seem all is contained by order. I can see why you would be more worried than most, but I deem implantation bleeding is more like pale spotting, might see a brown stain in your underwear, not 6 days of bleeding.