What could be causing my periods to be coming sooner each month? They used to be every 28 days, then 24, 22..?

Question

Now this month I'm at 20 days since my last period!!

Could there be a reason for the shortening of my cycle?

Answer 1

Your body is just finding it's rythym. It can take years after first getting your period for them to become regular. Or some women, never get regular. Are you sure that your cycle is shortening, or you are just starting 2 days earlier each month- because that would put you right at 28 day cycles.

Answer 2

It's probably just finding its pattern. They change the timing up every now and then. If it bothers you, birth control pills can regulate it at 28 days.