Me and my boyfriend had sex on the 19  without protection .. I took the plan b pill on the 21 ... I'm now 3 days late according to my calendar.. And yesterday I woke up with light pink spots litterly just spots when I wiped ... And today I have brown like when you end your period ... But less ... I'm aware of implantation bleeding but idk if it's just a side effect of the pill ..? Has this happened to anyone before after taking the plan b? Or is this implantation bleeding ? I also feel really lightheaded n dizzy ..