Pregnancy

I’m 17 and my girlfriend is 15 almost 16 we’re sexually active and we’ve been together for 3 + years and she’s been talking about having a baby???!!! Idk what to we’ve talked about it and I told her my opinion about it and I just think we’re way to young but I have a job 6 days a week and she doesn’t but I just wanted to hear some opinions on this thanks !