Irregular cycles can anyone Relate?

After I had my baby I know you bleed a lot but then like the next week I had got the birth control shot and I had stopped bleeding from giving birth and I was still getting my period while I was on birth control but then I started to get my period twice a month then one month it didn’t even come on then one month I had my period for like 2 weeks straight.. then I started having 34 day cycles then 26 days then 31 days and now it’s hard for me to conceive because of that, I Just wanted to know did you experience kinda the same thing? I’m Just giving up hope, I don’t think I can have anymore babies.