My period last month came a week early and was vsry abnormal. It was light pink then stopped and then restarted pink before stopping and then it restarted as a brown for a few days. I never had my period early or one similar to that. Now i have 10 days left till my period but i woke up with some blood on my panties. I didnt see blood when i wiped but wjy is this happening? My periods are never early? P.s. im very sexually active idk if that changes anything and last month i took 4 pregnancy tests that all said negitive