I had my period dec 7, 2013 and ended on the 12th or 13 th and me and my boyfriend had unprotected sex the 12th and on dec 19th I went to use the rest room and when I wipped the paper had like really light blood like a reddish pinkish them I started to wipe again and it was brownish I don't know what that means. I really need help

That could be just some mid cycle spotting. I am assuming it wasn't a lot?