I was a lot like you in my twenties, and early thirties. I would spend all weekend in bed, exhausted, wondering why I found everything so damned hard. I had at least two major nervous breakdowns, one leading to a three month stay in a psychiatric unit.
I was eventually diagnosed with autism at the ripe old age of 36.
I am now 40 and function much better in life, although to be honest most of the time I am still clinging on by the very ends of my fingernails half the time.
I was thinking about this the other day, and wondering why I had gradually become a more functioning individual over the years, and I realised a few things.
One was that it had taken me a long long time to learn how to do basic tasks effectively - cooking being the main example - and that the secret to doing so was basically endless, endless repetition of those tasks until they came naturally and I no longer had to think about them. I now know, of course, that executive dysfunction is a massive part of ASD, which explains a very great deal about me personally. I think autistic people are probably very slow to learn skills that other people pick up naturally, and so we get into a mindset of "I can't do this" where actually we generally can - ok not in all cases - it's just going to take fucking ages for us to learn to do so than it would do for someone neurotypical. This gets very discouraging, and leads to depression and frustration and profoundly low self-esteem.
The other is possibly more important - I have stopped thinking endlessly about things, and now I "Just Get Up and Do Them". If I start ruminating about all the things I need to do, and all the things I haven't yet done, and oh god I really fucked that up yesterday didn't I, I am using up valuable mental energy that I require to actually get things done, and I don't have very much of that to start off with.
I have rigid routines, designed to minimise stress and eliminate the need to think. So I am in bed at 10pm, no excuses, rigid sleep hygiene firmly in place. At 7am, I get up. Every day. I get out of bed before I even think about it, because if my mind starts Churning with Plans before I do, I'm fucked. Then before I do anything else, I eat to give me energy.
I walk a minimum of ten miles a day (helps with sleep) which I check on my Fitbit, take the pill back to back to eliminate periods (no mood swings, reduces sensory stress due to pain) I eat ABSOLUTELY regularly.
Shopping is always done first thing in the morning, when almost no-one else is in the store - this minimises sensory stress on me. Friday afternoon on mornings shift week is washing day, Friday morning on afternoons shift week ditto. Cleaning done once a week, Friday likewise, so I have the weekends free. Etc etc etc.
Life is kept as simple as possible: clutter in the house is kept to a minimum, I do not answer the door or phone unless I have to, I do nothing whatsoever to complicate my life, I have considerable built in down-time to allow me to decompress. If other people want to come round, I am free to say no. Just "no", with no guilt. No, I'm too tired, bugger off.
When I catch my mind beginning to Churn, I stop it.
I do not care what people think of me any more. If they think I'm weird, I am. If I don't get it right socially, so the fuck what. I'm doing my best, if that's not good enough, tough titty, like they'd be doing any better if they were in my shoes.
I basically go through life a bit like a robot, but it's the only way for me to survive - Turn Off Chattering Brain, Move. Do Stuff. Cocked It Up, Don't Care. Learn From Mistakes. Keep Going. Don't Think About It. Just Do It. Stop Caring So Much.
I realised that the stats for life achievement for people with HF ASD are woeful, so holding down a job and just living independently were huge achievements, considering everything.
It's very very hard, OP, I have to be honest.
This is why the focus society has on autism as an issue with an individuals social skills and nothing else drives me nuts. Personally the hardest parts for me are the overwhelming sensory issues and the crippling executive dysfunction, but most people have no idea about that at all.
My advice? If you are diagnosed with ASD - or something else - make sure you read everything about it that you can. You will understand yourself better.
If you had told me I'd be doing this well at this age around the time of my diagnosis - and that's only four years ago, after all, I'd have been amazed. Don't let yourself get discouraged - whatever you can achieve today is a positive.
Best wishes, anyway.
x
C