I thought I had depression but my GP said I had "low mood". It was a bugger to get out of though, and took me about 18 months to feel better. I was anxious too but never diagnosed formally. I think having certain personality traits can lend to predisposition. I had also forgotten to do basic things to keep my low mood at bay, and my then husband enabled my helplessness. It was a long slow decline until I sought help to reverse matters. It wasn't until a Talking Therapies staffer asked when was the last time I went out for a long walk, or went to get a haircut, or did something just for pleasure, that I realised I had got myself stuck in a rut.
Was I depressed? Maybe, or maybe not, or perhaps it was just my brain telling me I needed to give myself good kick up the arse. I needed counselling though, because CBT did nothing, and together with mindfulness exercises I slowly came out of it. But therapy only gets so far, you have to help yourself. Even if it's one small thing like going outside.
People still diagnose me though, not HCAs but people I know, who say I have ASD. I completely reject that because I know I am shy, introverted, and get tired by prolonged social entanglement. I don't have a lot of friends. I'm the person that goes home from a party at 9pm. So over it! I do think cod-psychologists are telling friends they have all kinds of "conditions" when in fact it's just their personality!