Hiya. I have always had irregular periods. So when i was 16 i went on microgynon pill? i was fine for about a year and half but then i started to bleed all the time wasnt heavy but was an annoyance. My doctor took me off then put me on cerezet, i as on this for about 6 months and bled pretty much non stop. maybe 2 or 3 days inbetween not bleeding. So then the doctor put me on the depo, about 6 months ago now itt stopped the bleeding pretty much apart from a couple of days but i could live with that. But then i got a Urinary infection and had to go on antibiotics, these where TRIMETHOPRIM. Ive been bleeding for about a month not and its really realllyy annoying me! Could it be the antibiotics or does it sounds seriouse? Please help!