Pregnancy after miscarriage at age 40

I found out I was pregnant in Nov 22 and sadly no heartbeat detected at week 8. So after the complete misscarrage I was ok'd to try again.

Now short back story, I was told my whole adult life I would have a very very hard time getting pregnant if I ever could. I tried medication to help and timing and never got my BFP. Now that I'm able to try again, I'm worried it will not happen. Has ANY of you been in this situation and got your rainbow baby and went to term?