(((((Googley)))))
You don't have to explain how it feels. There are others who have been there. I know.

Do something you really enjoy - something self-affirming - even if you don't feel motivated to right now. Remind yourself of things you have done right. Do something, however small, that you can take genuine pride in having accomplished. The more you act like you DO have worth, the easier it becomes to disbelieve those self-downing thoughts. Don't forget you DO have good qualities, value and potential that others can see in you, you just can't see it yourself at the moment.

You feel that bad, and yet here you are, reaching out to connect and facing the day anyway. That's strength and determination, right there!