I'm on hormonal birth control and have been on the same one for two years. why have i been heavy bleeding for one week and spotting for two weeks?

See your physician: It's not entirely unusual to have abnormal bleeding while on BCPs. You may need a change in the pill or some hormonal supplement. **You need to see your Dr to be sure you don't have some other condition causing the bleeding. In 50% of women with abnormal bleeding no cause is found. This was called dysfunctional uterine bleeding in the past