Random bleeding?

Dorina
Ok so me and my boyfriend are trying to get pregnant. Sunday started my fertility period, so we had sex, and we had sex saturday and Sunday. Today I randomly started bleeding. I'm not due for my period for a good 2 weeks? What is this random bleeding? It's not a lot it's very light. But it started this morning and has continued all day. Could this be implantation bleeding? What do you guys think? Help please!!!