could I be pregnant?

Quenesha
Me and my bf did it on January 17 this was in my fertile window and he ejaculated inside me now I’m experiencing extremely sore boobs very tired having to pee a lot more often and for the past few days when I wiped it’s was a very small amount of blood on tissue it only happens once or twice a day and then I don’t have anything else until the next day I’ve also been having slight cramps could I be pregnant? Is this implantation bleeding. My period I sent due for 4 days and i never spot before my period.