A good starting point about how HealthUnlocked came about is on their FAQ which is here: healthunlocked.com/about/fa...
The are becoming bigger by the day and the beauty of a community like HealthUnlocked is that you can join as many as you want and when you log in at the top you'll see a tab called "My Communities". That is where the list of all the ones you've joined will be and it makes it easier to switch between them.
We know depression and anxiety co-exist with other conditions, so you may find some of these communities useful.
There are many more in the directory healthunlocked.com/directory
Depression - Wales
Irritable bowel syndrome