Just wanted to add a couple of practical lines for your particular situation; you've had some good advice already. From your post, when you say you have literally no support, I'm surmising you're a single mum and not a keyworker, so you can't access any schools that might be staying open where you are.
On the 2:1 vs 2:2 debate, every employer is different, and every subject is different. Yes, the milkround employers (the big ones like Mars or the Faststream civil service or whatever it's called now) look for 2:1s, and when I first graduated I made the mistake of only looking at the tiny number of milkround employers who'd consider applicants with 2:2s, until I temped for a bit, the light dawned, and I adjusted my expectations and started looking for opportunities with smaller employers.
Only getting a 2:2 hasn't stopped me having an okay career. I'm sure some people would sneer at what I do but it's ethical and has offered decent opportunities. I'll never be rich, and we're not talking dazzling the world with unbelievable speeches and decision making from the Houses of Westminster or anything, but I've been able to progress as far as I wanted to. It even allowed me to work in other countries for a bit.
Most of the employers I've worked for have offered excellent work specific training, but I wouldn't have got past the interview stage without a degree or vocational equivalent; the class of degree was irrelevant though, they were much more interested in my "soft" skills.
Your first port of call needs to be your tutor, at least to let them know your situation, then your Uni's support services, pastoral dept, whatever it is they call it. Ask your tutor first though; this can't possibly be the first time they've had to deal with this unless they're brand new to lecturing.
And does your uni have any online peer support groups for parents in your situation? I know it's not the same as face to face, but it might help a little.
If your degree is mainly assignment-based, talk to your tutor about getting extensions, citing extenuating circumstances - how many more do you need to do, to get to that "I just need the hat and the bit of paper" to prove my stickability stage?
The other thing I've had to learn over the years is that "good enough" is often just fine when it comes to assignments, and academic articles, and presentations.
I really hope you manage to get some support - good luck.