michelle. have been there, on the floor face down howling. many times.
not PND, but the regular depression. It very nearly killed me.
Sweetheart, if MN is not being helpful to you, then give it a swerve for a while, come back when you are feeling stronger.
PND is a disease. Diabetes is a disease, high blood pressure, asthma..
Depression can be treated, controlled and cured in many different ways.
However you choose to fight it and get yourself back is up to you, but doing nothing is not advisable. Depression literally IS hell on earth, but it doesn't need to be. There are literally THOUSANDS of ways to help yourself manage it, and eventually beat it.
Remember that nothing BAD lasts forever, and that every bad day must end, and it'll take you closer to a GOOD day. Cherish those good days, try to write them down and remember them.
Fight that Black Dog, don't let it win.