Collision, I had pre-eclampsia first time round, a little earlier than you (27 weeks) and like you I worried 2nd time. I was given so much conflicting advice (from different medical professionals) ranging from you WILL get it again, to it NEVER happens again. Finally I saw a specialist in a London hospital who was brilliant, her first comment to me was, I bet you are worried that this could happen again!! Finally someone understood.
Her 'statistics' were that since I had no underlying problem, ie Kidney disease or Lupus or whatever, but that it had been so servere and so early there was a 40% chance of it happening again. However the likelyhood was if I developed it again, it would be about 4 weeks later and less servere.
When I got pg 2nd time around I went to see her again at 13 weeks and was given vitamin/aspirin therapy. She explained that this had worked in trials, but they were still waiting to advance it as a recognised treatment. She also said that is usually reduced the risk by 75%. This meant with my sususpected risk of 40%, I now had a risk of 10%. 10% is the average risk for a 1st time pregnancy.
I had loads of doppler scans in my 2nd pg (every 4 weeks, then every 2 weeks) which looked at blood flow through the placenta. They are looking for 'notches' on an artery wall (if I remember right) which has been proved to be an early indicator of pre-eclampsia. I had my final scan at 36 weeks.
By the way my 2nd was born on her due date!!
In your case you started to develop pre-eclampsia at 33 weeks, applying the 4 week rule brings you to 37 weeks, which is not really considered prem. I would chat to your GP, but there is nothing that can or should be done until after 12 weeks. Perhaps you can then get a specialist obs appointment to discuss your fears. However not many will prescribe any type of drug, even apsirin. My local consultant, who I continued to see, was really against the vitamins as he had seen no proof, however I was happy as I felt vitamins couldn't hurt. Also I felt at least I was doing something rather than waiting and worrying.
Good Luck, go for it, and think about it, would you do it again even if there was 100% chance of the same thing happening again?? I would have, and my baby was in intensive care for 14 weeks!! nearly 5 yrs on she started school on Monday!!