You need to direct your efforts towards finding support for the both of you.
Whether or not your DC turns out to be NT or ND - it almost doesn’t matter - it’s not sustainable if putting your child’s needs first, whatever those needs may be, creates a mental health crisis for you.
Things to consider
- practical support for domestic stuff - cleaning, organising, meal planning
- mental health support for you - therapy, medication, OT, support groups as appropriate
- social support for your DC if things like play dates, outings, soft play etc are enjoyable for DC but not possible for you to engage with
- as many other trusted adults in your DCs life as possible - aunties, babysitters, childminders - providing varied social time for DC & respite for you
Ask your GP or social worker if you have one about home start or similar programs that can provide ‘mother’s help’ services.
There are no easy hacks or ways to white knuckle your way through it.
You may already know this, but there is no circumstance in which is is ever helpful to tell your DC that their needs cause you harm or distress. (Ask me how I know, as the child of at last one ASD parent!)
Also: however high functioning and ‘neurotypical’ they may seem as they grow older, and however much easier they may seem to find life than you do, your child is never an appropriate person to lean on for emotional support or advice.
This may well be obvious to you, but it really won’t be for everyone, so please don’t take offence that I spell this out quite directly. If it’s not relevant to you, you can just leave it.
You're in a tough situation, particularly as a single parent. I wish you and your DC all the best.