8 Months pregnant and scared?

I think that after months of actually holding it off my body's given into preeclampsia. I woke up this morning with a terrible ache in my right abdomen and shortness of breath. I have a doctors appointment on Tuesday, but I'm wondering if there's anything I can do until then. I know there's no cure for preeclampsia, but Id like some help in what I can do to not aggitate it and make it worse. Thanx!