hi, i have been bleeding for 7 weeks now. the first 3 weeks wasnt heavy, started bleeding heavy after 3rd week.blood work, sono, biopsy and pap smear came back normal. doctor said it pre menopauze symptoms. im on my 11th day birth control [ VIENVA] and still bleeding heavy. chunks of cloths. can it be something else and what can i do to stop bleeding. it is very annoying. have to change pads like every 2 hours. Thank You