Hi! I'm 16 and my boyfriend and I were having non protected sex a couple days after my last period and he came inside of me. We hurried up and got dressed and went straight to CVS and got the plan b pill and I took it right away. I did not get nauseous or anything, but exactly a week later I'm having like a mini period. It started out really light then the second day it got really heavy for 5-7 hours with blood clots. The third day (today) it was light spotting. Is implantation bleeding or the plan b period? Am I pregnant? PLEASE HELP IM SCARED!!!