Me and a guy friend had sex the 17th day after my period used the pill out method. Today I'm ovulating and have been spotting since yesterday. Its brown with bright red specks of blood. I dont think he got any sperm in me but there could have been some present only takes a small amount. I also have some light cramps then again my periods are starting to get all over the place is this something to be concerned or is it implantation.