Itchy Belly

My huge belly has gotten super itchy lately. There's also a red rash covering it, especially when the itching is at its worst (and after I scratch--I know, I'm bad). Matt and I are pretty sure it's PUPPS, a common and harmless problem for pregnant women. What I want to know is this: Have any of you recent or current preggies dealt with this? If so, how did you treat it? I'll be getting advice from my doctor on Thursday, but I'm hoping to find something to at least help between now and then to keep me from going crazy with the itching. So far, I've tried hydrocortisone cream (doctor's advice), and different lotions rich in vitamin E. The lotions help a little, but if you know something better, please tell me!