Welcome here to hte Support Forum. I agree at the start it seems confusing, hte trick is not to worry too much, it will sort out.
The main idea is you have our won 'thread' which you give a name others can see -and will understand your main topic. One can put htat new thread in one of many places, depression, Anxiety, .. and so on.
If you go to the stat of htis thread (one page one) you will see how to make a thread. In the meantime if you get stuck simply sing out here.
Losing your doctor is a terrible upheaval, and at the moment I'm sure you will think there will never be a complete substitute. I've felt that way too when mine retired, however I've managed since then and have found one who is sensible, and competent in other ways too.
Not being a spring chicken is not all bad you know. True technology can be a hassle, but your years of experience in life is more important - and more useful
We will look out for your new thread