[s1artibartfast]

I run into the same struggles at work with anxiety and expectations.

Telling myself I can quit, get fired, ect didnt help.

What did help was bringing more honesty into my job and letting go of ego. I felt like I was making the project success personal, suppressing and internalizing the stress, and holding myself to an impossible expectation.

My recommendation would be to just bite the bullet and give an honest update to your manager, tell them where you are, and ask if they have any additional ideas. Healthy organizations actually want this. If your manager blames you, you have a different problem to deal with, but at least you are one step towards getting out of your personal hell.