when is right time to give up

Franciscah RN, Bsc,PgDip,MPH, PHD......uploading

I had a miscarriage when i first started my baby journey that was in 2015. I got pregnant again after 8 months n had my baby in june 2016. Its been so hard this time around. Im 35 this year n i really dont want to be an old mum. When is the best time to call it quits?