Breastfeeding- when do periods come back?

Sophie

Hello, my baby has been breastfed since birth and is now having a lot more solids and less breast milk i kind of expected my periods to come back by now... she's 7 months is there a time they're normally back by? I only ask because we want to try for another when she's around one and I'm starting to feel like they're never coming back. Any advise would be great. Thanks Ladies