I feel like I could have written your post myself- I had to double-take for a second. I feel in a very similar position to you. I hadn't considered telling anyone else but my therapist because I've not had very positive experiences in the past (people offering me a space to stay rather than being alone, then within hours letting me know how in the way I am which when I'm already picking up on how rubbish I am at being a productive member of society, was really difficult to hear being one example).

I wasn't sure if you had a therapist or anyone to talk things through with? To be honest I think you'd need more than just a therapist, they are amazing people but once the door is shut it can really feel even more like your on your own because you've just had a moment where you were not, the stark contrast is always something I struggle with a lot.

So having said that, I'd try to sort something out in terms of support if you can. And I am aware not all of us can. If you are lucky enough to have people around you it may be a case of leaning on one person for one thing and another for another thing or just time limiting everything. It can feel like juggling a bit but being without anything at all is far more risky and at least by being around people who know your not really OK atm is a better way of doing things if you just feel like emotionally your at the point of collapsing.

In my experience, if you are thinking about asking for help or letting people know, it's then you act and do something, because the next step is where your not able to see or think straight and then your just a ball of sensitivity and so overwhelmed by everything (let alone the insides of your head) the idea of telling anyone anything feels far and beyond and its way to late to start.

Write it down, take it to someone, if you can read it out then do otherwise leave it with them. Make it clear to them how they can help- people in your life may feel worried but not know what to do, people like to know how they can help and if they can help, but don't just wait for things to get too bad because they will and IME can do pretty rapidly.