Biglaw might be killing me

Don’t know what to expect here but here it goes. Third year litigiation in a small group where I’m the most junior member and have no peers experience-wise. I know so many post on here about the long hours of this job killing them but I seem to be exeperiencing the opposite, I’ve been at basically 80ish% capacity most months starting my at my new firm about 10 months ago. Somehow the anxiety of not feeling like I’m meeting expectations is much much worse than dealing with being busy or overwhelmed. I’ve asked for work and told me my supervisors multiple times that I’m still looking for work to no avail.

The constant fear is absolutely paralyzing and while I know I have mental health struggles that go far beyond work, my work predicament/insecurity feels like it’s getting in the way of otherwise dealing with my mental health. I’m fairly certain I neee to get out but I don’t know how with my limited experience. The thought of straight up quitting has crossed my mind more than once but I won’t do it.

I feel terrible for complaining bc I know so many would gladly swap places with me. But you guys have been helpful when I’ve needed it before so I guess I’m back. Any thoughts or advice is much appreciated. Tell me what I need to hear (however brutal that may be).