Could it be implantation bleeding?

Me and my boyfriend had been having unprotected sex all of june yesterday and the day before i started getting this pinkish light blood only when i wiped today June 23rd nothing has come out i just feel different more tired and my lower stomach was kind of sore in the morning i am supposed to get my period July 1st so about 8-9 more days I've never experienced this before could it be that I'm pregnant?