Wanting to but he’s not...

So I’ve been with my fiancé for 6 going on 7 years. We are getting married in September and I guess you can call it baby fever because all our friends are starting to have babies and I feel like I’m getting super jealous. He talks about wanting kids but no time soon. Im almost 22 and I know that’s still young but I really want to get pregnant. I don’t know what to do because every time I hint he ignores it. I don’t know if it’s because of financial reasons or if he’s just not ready or if it’s because we aren’t married yet. Hoping that maybe after we are married he’ll start wanting it but if not I don’t know what to do.