I am 21 years old now. Ever since i have gotten my period they have always been normal, on time and lasted only 5 to 7 days. but this past month i got my period about 2 days after i was supposed to get it and i wasnt having cramps and my breasts weren't sore and my period was very light for about 2 weeks then it stopped but every time i have intercourse it comes back really light but always comes back for an hour or 2. why would it be acting like this?