Could I still get pregnant?

Has anyone else had something similar?

I’ve come off the contraceptive needle in hopes to conceive baby 2, I was on it for 6 months now been off it for 4 almost 5, I haven’t got my period since being off it (I didn’t get it whilst I was on it either) does this mean I will not conceive until my period comes back and starts ovulating? Or do I have a chance to still get pregnant?

I haven’t been able to track my cycle and had irregular periods prior to baby number 1 as well