I was suppose to start my period on Wednesdays and I am never late. Well nothing came and the next day I had two episodes of bright red bleeding with no clots, and from then on just spotting pink. Today is Friday and it's just the same spotting. My periods are always on time and heavy with clots. I am sexually active, and I don't take my BC like I should. Is this my period or implantation bleeding ?

The bleeding is not enough to fill a panty liner.