Ah, anxiety and depression: What an insidious cycle they create when they are functioning in tandem.
You asked if anyone can relate. I sure can. Just recently my depression has started to involve an agitation/anxiety component, and boy is it vicious, as you know.
Are you still taking meds for depression? If it helped before, it might be worth reconsidering. And I would definitely recommend trying an anxiolytic. I just started Xanax (again) for that reason. It helps me calm down and not stress/depress myself into a tailspin. It might be worth trying, if you're willing. (And Xanax is cheap; a 30-day supply of the generic [alprazolam] is only $3, at least in my neck of the woods.)
Best of luck to you.