How long will my first period be b/c i'm on birth control?

its already been 8 days and mine are normally 5-6How long will my first period be b/c i'm on birth control?
Unfortunately for some women it goes for longer on birth control for the first month or 3. Sometimes they get spotting throughout the whole month. I think this is a normal side effect for some women but you might like to mention it to your doctor if you keep bleeding.How long will my first period be b/c i'm on birth control?
Takes a few months for your body to adjust ec.


so in a few months should be down to atleast 3-4 days tops


and after awhile maybe even shorter
No one can tell you that. It is totally up to your body.