@TokyoStories That is definitely a symptom of ADHD. It even has a (colloqiual/internet) name - ADHD paralysis. If you google this you will find many stories of other people who feel like they have been stuck in bed. Sometimes I wait so long to get up that I fall asleep again!
And I have held my wee so often for so long that I managed to cause problems with my kidneys (do not recommend).
Since you have such a long wait I'd try to use the time productively and try learning as much as you can about ADHD. Russell Barkley is one of the world experts about it and he says there are four pillars of managing ADHD / four steps to do in order.
First is evaluation/diagnosis, because you want to rule out other causes and see if there are any comorbidities. By the way, many of the things to rule out are things that your GP can run blood tests for - you could ask to have blood tests for the standard/common vitamin deficiencies as well as thyroid levels. You could have a sleep study done if you feel excessively tired. That then only really leaves other psychiatric disorders, and since many of these have symptom overlap with ADHD it's possible that ADHD techniques could work to help manage those too. So yes stay on the waiting list, and it would be ideal to do this step first, but I honestly don't think that it would be terrible just to go with the assumption that it's likely to be ADHD and move onto the second.
Second is education - well you can learn about ADHD all on your own, you don't necessarily need a diagnosis for this. Good resources that I've found:
You Mean I'm Not Crazy, Stupid or Lazy? (Book) - good for an initial primer.
Russell Barkley's talk on youtube - 30 essential things. It's broken into sections or you can listen to it on a playlist.
The Reddit ADHD forums
MN ADHD chat threads - try Neurodiverse MNers
How to ADHD youtube channel - lots of practical tips
Podcast "A Slob Comes Clean" - cleaning advice for messy people. It's the only habit-forming advice that I've found to work for ADHD. (Works for habits other than cleaning too).
ADHD Essentials podcast
For more depth:
ADDitude magazine and their Experts podcast
Russell Barkley's book Taking Charge of Adult ADHD
The ADHD Report - a newsletter about ADHD which ran from 1993 until this year. You can download all the back issues for free. I'd just start with the most recent and go back until you get bored/forget.
ADHD Rewired podcast
Search Russell Barkley's name on any podcast service and find interviews
Note I don't really recommend any social media content for ADHD (except for How To ADHD) - that's a whole other post but in general, long form content is MUCH better for learning anything. Short form (instagram, tiktok, twitter, reels) is generally too short to include any nuance so you get confusing exaggeration or oversimplification going on.
If you struggle to stay focused on audio (I do) try listening while your body is occupied in a non-language activity. I can listen to podcasts while I run, walk, commute, fold/sort laundry, wipe down surfaces, but not when I'm sorting outgrown clothes into size piles, playing with DC or decluttering. (I think because I'm making decisions in those situations). This is a nice little hack actually because I want to do more of the exercise or cleaning to get to the next podcast!
The third step is medication, which you'd need a diagnosis for, and the fourth step is making concrete changes in your environment and trying to modify your behaviour. That is because making changes is easier and more likely to be successful with medication. But honestly, you'll find that you naturally start to make some changes just by reading and learning - and I think this is a nice, organic way to do things. Then when you do get to the point of diagnosis, if they do think it is ADHD and you can try medication, it might be that it makes those tools you've relied on even better, or it might be that it helps you get started with new ones.
I was diagnosed in 2016 but I'm only starting medication now, so I've had a lot of time to learn and I really think this was a good thing. (Though, honestly, I don't think you need 7 years!) I thought that it was considered best to start medication ASAP after diagnosis, but I feel like what I know now has really helped temper my expectations of medication and fine tune what I really hope that it will help me with. It also means that I've been trying to arrange my life for the last 7 years in ways which align and work with ADHD, and I have a much better idea of where my real strengths and weaknesses are - if I look back to where I was back then, how I was struggling and what I was struggling with, I've grown and changed SO much and while there are still moments of ADHD paralysis (I said to 4yo DS "let's go into town" at 11:30 this morning and we only ended up standing and waiting for the bus by 13.30, having skipped lunch and everyone slightly manic except for 1yo DS who fell asleep!) I don't spiral about this kind of thing any more and I have lots of techniques to work around things.