I remember that feeling from years of graduate school!

One thing that (sort of) helped me was to separate the real issues (Need a place to live) from my hyped up anxiety about the situation (OMG I'm going to be homeless; I don't even have a shopping cart; It's starting to rain; What am I going to do? I'll freeze; I'll die!).

Because there are rational steps to deal with the real issues (Look at places to live) while the anxiety just spins itself out of control.

Hang in there!