I am so sorry for your loss of your daughter.
May I ask why you were being monitored with a nonstress test? It's very unusual for them to do them before 28+ weeks (or at all with people having "normal" pregnancies), so it sounds like there really must have been something going on aside from the nuchal cord.
Starting a second pregnancy with high blood pressure definitely will raise your risk of getting preeclampsia (possibly again?). Also, having HELLP syndrome puts you at higher risk to have preeclampsia than if you *only* had preeclampsia. But risks are just numbers and there are no guarantees either way. I developed HELLP at 23 weeks with our daughter, they gave me very high odds of getting pree again (like 70%) , I ended up not getting sick at all.
Me (29) DH (30)
#1-Olivia Caetlyn-9-28-09-9-28-09, 23+2 wks, emergency classic c-section, class I HELLP, IUGR
#2- Lucas Oliver (rainbow baby)- April 2011, 36+2 wks, HELLP and pre-e free! (lovenox and LDA pregnancy)
#3-Matthew, late October 2012...mostly normal, 37 wks, (lovenox and LDA again)
My blog: http://www.butterflies-and-rainbows.blogspot.com/