my period has  been on for a month now. its not heavy. in fact its so light that i dont have to wear anything not even a liner. every now and then i will get a blood clot or two. but no cramps like i usually get and normally its super heavy. im for sure not pregnant. let me add i jus changed sexual partners and my last boyfriend i was with for 3 years and he always nutted inside of me. my current boyfriend i have been with for  months and we use protection faithfully.. could it be that my ex boyfriends semen was regulating my period?? help!!!!!!