Mine came back in December, then the next one wasn't til about 2 weeks ago. There was about 7 weeks in between.
I'm still BFing & was only down on feeds while he was sick for 2 or 3 days when it returned, so I don't think I'm ovulating yet, but now that its back I am planning to go & get my depo soon.

(You can't fall pg when not getting any, so I'm not stressing too much atm!!)

My girls were only BFed for the first 4 - 6 weeks & AF still didn't return til they were about 4 - 5 months old.
It was kinda regular from return then though I think.

So it could be a bit all over the place ATM.