TTC in your 30's

Me and my hubby have finally decided to try to have our rainbow baby! (We need to move into our house that we've been remodeling first lol) I was 23 and 27 with my other 2 pregnancies. I'm nervous! Is it a lot harder to get pregnant in your 30's??? I mean I know other people who have but I'm a little anxious! 😆 Probably also, because last time we lost our son 😔 So many feelings!