Hi , I am 18 and on I've had sex and it wasn't even boyfriend pulled out and I was bleeding . The bleeding last for like a hour then stopped completely. I've been on Depo shot since April 15 and haven't experienced no bleeding until sexual intercourse which was May 25 and I woke up this morning(the next day) and no I have brown like old looking blood discharge .. I read that sometimes mean my period is about to start or something can some help me please .. Thank you!