Hello Twisted,
So sorry to hear how you are feeling. I know that feeling well. I was there a few times. I'm glad you will be seeing your tdoc tomorrow but I bet you your tdoc would also suggest that you call you pdoc to see him/her sooner than the 21st. If your not on a antidepressant, your pdoc may consider adding one to your cocktail.
In the meantime why don't you at least try to set the tiniest goals for yourself and try to at least complete 1 a day. It takes a lot of work, but you really need to push yourself and that is why I say even if you just start with 1 goal a day. It doesn't have to be big either. Try like: "I will read my book for 15 minutes today."
Try to plan ahead for your weekend with little things you hope to do that will make you feel good. Write down something that you would like to do Saturday morning and evening and the same for Sunday and try to stick with it. Even if it is to invite a friend over for a hour or two to accompany you to take the kids to the park with you or just to sit and chat or go for a walk outside somewhere nice or to watch a movie together. When I am depressed I try to push myself out of the house and go to the mall or stores and just window shop. It's nice to just browse with no pressure or agenda that I have to buy something.
Try not to isolate yourself and don't be afraid of asking for some help from others to help you out.
Try to put some type of structure to your day and stick with it. It is a very difficult time to be in but most importantly you have to remember that medications will help but you need to do most of the leg work and really, really have to push yourself. Remember 1 accomplishment a day is GREAT even if that is all you can muster up for a day.
(((Hugs)))