Give in to it. I have to do that from time to time. Give in to the feelings and go with them.

If your being depressed is from anger and frustration scream, run, hit pillows, hit a baseball.

If your feeling depressed is due to sadness and being down go w/ that. Cry, listen to sad songs, pet and love your cat (dog, hamster, what ever). Write about the issues, PM some one, flip out or dump your issues here at PC. I probably do that the most.

Get T. If you are in T ask for an extra visit. Mine can't always do that but she can squeeze in a 10 min phone session. It's helpful to hear the voice of reason and calm. Hope something here helps. I've been there. Just know if you stuff it eventually all that stuffing starts to come out and when you loose your stuffing it feels like you are coming apart. A wize teddy bear told me this. Go hug your teddy bear.