So sorry to hear of your loss mum. Miscarriages are horrible, and mmc so cruel, as you have no idea anything is wrong.
I'm not sure if this will help you or not. I'm 40 & on my "last-chance-saloon" pregnancy. I have DS (3) but he came very early due to PE & spent a long time in NICU. After a lot of soul-searching, we decided to try agin.
I was pregnant within a few months but had a m/c at 6/7 weeks (which was subsequently diagnosed as a molar pregnancy).
After 6 months of follow-up testing, I was given the all-clear to try again & got pregnant in April. Had a good scan at 8+5 but had the tiniest bit of spotting at 11+5. It was a mmc. We were gutted.
We decided to give it "one last shot" & I'm currently 16+4. It's been extremely nerve-wracking & I've really struggled emotionally.
However I didn't want DS to be an only child, so that was my motivation.
I really hope you find peace of mind, whatever you decide. However, just now might not be the best time for making decisions.
Take time to recover, then see how you feel x