My boyfriend and I had sex about a month ago and I took plan b but my period was about 3 weeks late and I’m panicking I took 2 pregnancy tests the 2nd week of my period being late and they both came back negative. I normally have a light shirt flow and I know that plan b could make it lighter or heavier the first cycle back but I’ve been using a liner or a very very light pad and I’ve been fine no bleed through or anything. It’s just been a bit of blood but it’s red. I don’t know if it’s implantation bleeding or if it is my period, I’ve had cramps and at first it started as dark discharge w clots maybe Friday or Saturday but then it started coming out red on Sunday. Can someone please tell me if it’s my period. I’ve had it since Sunday it is now Tuesday.