My first pregnancy I had "mild" preeclampsia that ended in a successful induced birth at 37 weeks. And afterwards, I recovered fine, no bad side effects, and effectively forgot all about it. It had happened, but I had a baby to take care of, and I was fine, so even though I'd had an idea of how bad it could have been, I didn't think it likely I'd face anything worse the 2nd time around.
Flash forward, and 8 weeks into this pregnancy, I get high blood pressure. Turns out my mom's family has a history of hypertension, so that showed up instead! *grump* I spent about two or three weeks after the initial problems with this pregnancy alternating between freaking out and being calm because I had to work and focus on other things. So, I completely understand that kind of "ambushed" feeling you get when you have put a problem behind you and it jumps back up where you didn't expect it.
On the good side, you don't have far to go to get to that "safe zone" of 37 weeks. I hope the holidays provide some distraction, and that you find time to rest during all the bustle!
1st son, induced at 37 weeks due to pre-e, born 6/18/10.
2nd son, c-section at 37 weeks due to hypertension, born 1/15/13.