I had a second trimester miscarriage last year at 17 weeks. Everything had looked perfect and normal, we had lots of scans (due to my history of recurring miscarriages), and a really good one at 12 weeks. However, my combined screening came back with a very high risk for Downs. Tried the Harmony test twice, it failed, and then finally decided to have the amnio because we had to know what was going on. But when we went in to have it, there was no heartbeat anymore. They reckon it had died around 14 weeks...
We decided to have all the tests and the post-mortem, and it turned out the baby had Edwards syndrome (trisomy 18).
It took me a long time to work through that - I had had 3 miscarriages before that, and had thought that finally I had been lucky. I had counselling, which helped a lot. As did many threads on MN, especially the 'TTC after MC' ones - definitely can recommend you to check it out, if you haven't already.
We then tried to give it another go, and I found it incredibly hard - ttc after mc is really really tough. I am well aware that at my age (43), the odds are not exactly in my favour - esp as 2 of my 4 mcs were found to be due to chromosomal abnormalities.
But - I am now 30 weeks pregnant, and everything is looking good - I still struggle sometimes to believe that this is real. But it is possible, don't give up hope. I never thought I would get here!
Give yourself time - don't rush things. You need time to grieve, time to figure out what you want. There will be bad days, but they will gradually become less and less frequent. Do what you feel you need to do - it's OK to avoid people! You have been through so much, it takes time to muddle through. The pain never goes away, but it becomes manageable.
You have every chance for a successful pregnancy, don't give up hope. I had DS when I was 39, and this pregnancy was a natural conception without intervention. I was given progesterone in the first trimester and have to take heparin, so maybe discuss with your consultant at the follow-up meeting what would happen, should you decide to try again. The tend to take late miscarriages more seriously, so chances are that you will receive much more antenatal care next time.
We had a long chat with our consultant, and he was very positive about my chances, in spite of my age. So it should look even better for you.
Good luck with whatever you decide to try and when! xx