For what it's worth I understand how you're feeling, and those feelings are valid. No need to answer an internet stranger, but why is it that you feel worthless? For me I think it's because I care too much about what other people, that I can have value unless someone else sees that value and acts on it. I've been trying to focus on that, and say the things to myself that I wish others would. It didn't work at first, but I've noticed my self worth increasing ever so slightly the more I do it. So if I could offer some unsolicited advice, try to figure out why you feel the way you do. Without that you can't start making meaningful changes.
From another exhausted person to another.
What's better than one capybara?