Typed out a long post full of personal details, then deleted, but, honestly, the specifics don't matter. What DOES matter is that you save every tiny bit you can, because having FUCK YOU money is - by far - the most important thing you can do for yourself.
It's saved me from everything from wrong relationships, shit jobs, from natural disasters... I have both made lots of money, and not, but having savings, and the ability to walk away is having POWER, and the best "self care" a woman can have.
Shit happens. Things change. Even to you. Yes, you can save - even a little - when you are poor.
Do it. Please.