okay so here is the situation

we have unprotected sex sometimes.
she has had her period * (it wasnt normal like a day of just light blood)and then a week or two later 2 days after her period normally comes she bled alot for about 5 days and on the third day she bled alot in her sleep.
now she is off her so called period and her back hurts and stuff
and off her period for 3 days she took two pregnancy test and both turned up negative

im just looking for a bit more info.

thanks

,dustin