Sorry you're feeling like this. I have bad SPD to and despite the osteo, physio, acupuncture and pilates, I'm still on crutches. The best way I cope is to harvest my energy into small amounts and rest when I can. I realise that has to be a lot harder when you have small children around.

Would doing a daily count down help - a bit like an advent calendar? Every day you get through you get a little treat?

Also I agree with pp - if you can, buy something nice to wear, it makes a huge difference to how you feel.