Unfortunately, there are quite a few women on these forums who have pretty normal second pregnancies and then get sick again for the third. I'm only 15 weeks right now in my 3rd pregnancy so can't speak from experience yet on that (though I have a similar history to you except my second was born at 36 weeks due to my classical incision from my first pregnancy- even though i developed gestational diabetes that time, I never did get sick.) My doctors consider me just as high risk this pregnancy as I was for the last one, although I did talk my MFM into cutting my lovenox dose in half this time.
As early as you got HELLP in your first pregnancy, you may have higher odds of getting hellp again vs. someone who had it much later in the first pregnancy, but still, the odds of HELLP recurring are pretty low. While your blood pressures aren't great, they aren't *that* bad either. Hopefully you can get by with just some meds for your blood pressure and not any other drama. Also feel free to join us in the "pregnant again" section of the forum.
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/