First of all, you poor thing! I am so sorry that you are experiencing so much drama after losing a baby. That is really not fair.
Secondly, wow those are some crazy blood pressures.
My non-medical professional opinion is that your pressures are probably what is often called here on the forums "labile", where they swing up and down and all over the place while your body is trying to basically fight off pre-e or PIH. Eventually, they will likely "stabilize" higher (although meds may help) or turn into full-out preeclampsia.
I know being in the hospital sucks but I am glad they are keeping a close eye on you. My guess is with your history of abruption especially, their tolerance for delivery will be pretty low. While obviously no one wants a NICU baby if you can help it, it's good that they've given you steroids. My OB told me when I was pregnant with DS that in our area the survival rate of 28 weekers is 90%, so as far as early babies go, you are in decent territory at least. Hang in there. I will be thinking of you. Please keep us updated.
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/