I am so sorry you're going through that. For the first 8 months of my son's life I felt like a complete shut-in bc it was a long flu season and I was terrified he would get RSV so I almost never took him out of the house. My husband works and I had no family in-state, so friends would occasionally visit, but I felt so isolated.
I don't have any advice for how to get her to sleep more, but when you're feeling as you are, all I can say is get someone to come over and help so that you can get some time to yourself to feel more human!
Some kind of consistent help so you have some free time to look forward to. That's my advice for what it's worth, if I could do it all over again, that's what I would've done.
Stay strong! I hope things get better soon!