Thanks for the advice.

I've recently restarted on anti-depressants. I was on them previously and didn't realise they were helping because the effect was quite passive, I came off them suddenly when I moved house and the next few months went... badly. Luckily I don't suffer any bad side-effects from the one I'm on, so I don't have a problem with trying it long-term.

I'm interested in mindfullness and CBT because I want more constructive thought patterns to allow me to stop it getting so bad again in the future.

Will take a look at those videos.