My boyfriend and I had unprotected sex on October 29th (2 days before expected period). My periods always come at the exact same time every month, but I'm irregular in the sense that I ovulate late. So the 31st came, no period. Time went on and I started getting basic pregnancy symptoms. All negative HPTs. But I just got a feeling I was So I did an online EDD calculator since I know I would've conceived a few days after that, and according to that I'd only be about 4 weeks and 1 day. But yesterday I started bleeding. (After 17 days of no AF). My next period isn't due for another 2 weeks, so the timing is just really off. I've heard of IB looking/feeling like AF, and I know some bleeding is normal during early pregnancy. So I'm thinking one of three things:

1) it's implantation bleeding cause it'd be due around this time 

2) maybe I'm bleeding because my boyfriend and I had sex the night before it started and I read that could happen

3) maybe my period was 17 days late

(But that's not normal for me AT ALL)

Thoughts? Opinions?! Please!