Hello, This Is A Period/pregnancy Control Question/problem. I Hope You

Hello, this is a period/pregnancy control question/problem. I hope you don't mind, I am just getting really annoyed and it's ruining my sex life.

I am 18 years old, been sexually active 2 years and last December I took an injection of birth control, it was meant to last around 6 months, but however it doesn't go well with me. My period completely stopped for 6 months straight, then my period came back for a few days so I was happy was almost back to normal. After it stopped it stopped for around 3 days then started again for 5 days which is average so I though now it'll be back to normal, but then when that finished it came back 2 days later for another 5 days, then it stopped for 3 and now its back again. I just want it to become normal again, this is just depressing my sex life and its not fun worrying when/if you're going to bleed. I just 100% regret taking that injection.

Is there any way to just get my period back to normal again being around 5 days monthly, not weekly.