i was taking Depo Provera as my birth control and i was about 4 shots in and i stopped; you get the shots every 3 month. i stopped because it gave me my period for a very unusual long amount of time. but now about 1 year and some months off of it, and my periods are still irregular. i have missed them completely for a month then the next month i will get them on time and for the right amount of days(5). this month tho i am already 4 days late. i was just wondering if it is possible for them to still be this irregular after 1 year and some months of not being on birth control.