Opinions please!

Ok, so my husband and I had sex on the 27th of June and that was the last time we had sex and also the last time I took my birth control. Well, I wasn't suppose to start my period until July 6th and it came June 30th and ended on July 4th. Anyways, I was outside for two hours and came in to use bathroom and was pinkish blood on my underwear (small). What do u girls think?