Afraid we have left it too late...

I have had a bumpy road with pregnancy. 2016 miscarriage that turned out to be a cancerous rare molar pregnancy.(google if you’re interested), I needed treatment and recovered completely and then had to wait a year to ttc and after a few months I had a chemical preg and the n finally got my bfp. I have now my most beautiful 3 year old and I want to give him a sibling, I am turning 38 soon and I am terrified I have left it too late we are ttc from next month. 😥🤷‍♀️ is it too late? We didn’t try before now as I had a hard pregnancy last time and we wanted to be in a better position career wise etc 🧐🤦‍♀️