Trying again after a mc! Help!

Hi girls. I have a child of almost 5 years, it was a normal pregnancy and I got pregnant in my first month of trying.

Since last december we were TTC#2 and in May I had a chemical at 5 weeks.

I will be 39 in september and I don’t want to wait more time and be older to have another baby.

My ob is super conservative and old School, told me to wait 3 months, have an App With him and then try again.

I’m worried what happens if again takes us a lot of months to get us pregnant and i’m near my 40’s.

I read that we are more fertile in the next 3 months after the mc.

I need advise. I want to try again in July.

Thanks!