I was exhausted from looking after a toddler, had a husband who worked away a lot and little support other than nursery (which toddler was an absolute nightmare to get ready for every morning).
I kept getting colds that I couldn't get over before the next hit and no time to rest. Nothing you'd go to the doctor with. It was over about 6 or 7 weeks. I felt so run down, but I didn't go to the doctor about that either, because what would they do? It was making me feel low, as lack of sleep and battling colds can, but I wouldn't have called it a mental health issue, so no GP appointment for that either.
I then got flu, along with my husband. We felt dreadful. He recovered, I ended up in hospital with pneumonia and sepsis. I strongly believe this was down to the exhaustion, caused by the relentlessness of life at the time, lowering my immunity until my body could no longer cope. I was hospitalised for a week and took months longer to fully recover. It caused MH problems, very scary ones. I suffered post-sepsis insomnia and anxiety which culminated in psychosis. I truly believed my husband was, along with the GP, trying to kill me. I was physically still incredibly weak and contending with the most frightening experience of my life. All because I had to keep going, because the reasons to stop weren't good enough. There's no underlying condition that's been identified since so I'm fairly sure exhaustion was the overall cause.
I worked for myself but gave up after the illness as that was the only thing I could do to ease the situation. I couldn't move house to be nearer to husband's work, he works all over the country/world. I couldn't get grandparents to babysit, half are dead the other half elderly and not in a position to. I couldn't take paid holidays, I was freelance. We already had a cleaner , who had previously reduced to a once a fortnight service, and they were the only service to cover our area. I couldn't find a dog walker, despite trying various options for months. We didn't have a nanny as my child hadn't settled at all when we'd tried.
You don't know what of the situation is the OP's choice. At the point where you're so exhausted you turn anonymously to an online forum in desperation, it's quite possible that you just can't think beyond how exhausted you are and how you're going to make it to the next day. I can't imagine reading your posts will help the OP, which is the usual point of proffering advice.
It's clear you're angry about something, quite possibly very legitimately so. But it isn't the OP, of whom you know very little. I've read some compassionate posts with ideas that may work for the OP once they have time to breath and take stock. I just don't think they are at a point currently where they can process things well, everything is hopeless as they feel now.
If they need time off, I hope they take it, however works for them. Because nothing, absolutely nothing, is worth sacrificing your physical or mental health for.