There are a couple groups for trying over a year, it would say LTTTC, which means Long term TTC. and as far as loss there are some of those too!
https://babyandbump.momtastic.com/ttc-groups/864276-ttc-6-months-9-bfps-counting.html
https://babyandbump.momtastic.com/ttc-groups/216623-ttc-after-mc-info-please-add-your-details.html
These are just two that I found. If you look there are pages of groups and if you don't see it on the first page, then click on page 2.
Good luck
https://babyandbump.momtastic.com/ttc-after-loss/
there are many boards here^^
https://babyandbump.momtastic.com/problems-trying-conceive/
and more boards here for long term ttc