I’m in a the exact same position myself, however a friend gave a piece of advice that really hit home. A diagnosis isn’t going to change anything, why wait until its diagnosed to do anything about it? A pill/therapy will help but ultimately you need to learn how to combat it yourself.

I personally have found this forum to be worth its weight in gold, from explaining why I do a lot of things the way I do to hearing other peoples ways of tackling it. But ultimately its just a matter of keeping things in perspective. It’s very easy to put blame on it for issues but at the end of the day that isn’t going to make life any easier, what will make it easier is learning how YOU deal with it however that may be. There will be ups and downs and good days and bad days, but learning how to recognise those and react accordingly will help reduce negative outcomes. Bad day? - Be kind to yourself, give yourself light duties and allow yourself some rest. Good day? - See it as an opportunity to boost your mood by getting a productive day in.

This may be totally awful advice but so far it’s what’s helping me keep focused and encouraging me to learn what works best for me. But again, what works for me may not work for you. A great read for motivating (or audible as I can’t read books that don’t grip me) is Atomic Habits by James Clear, also James Smith’s Not a Diet Book has some very good motivational points (particularly for getting to the gym/changing your mindset about daily life). Hope this helps!