Can birth control regulate your period once you get off?

I’m 17 and I’ve been on birth control for a while now. I first started with the pill for about a year and I switched to depo and I’m now on my last shot for the year. Ever since I first started birth control, my periods has been every 3 months. The reason I got on was because my periods were very irregular and long. I want to get off depo before the 2 year mark, but will my period be regulated or most likely be out of whack like before?