Freedom Insurers might be worth a try.
They are specialists in 'existing medical conditions' insurance and often without additional a premium penalty.
If you Quote BPA
you will also get a 10% discount on your premium.
They may ask for a 'fit to travel' certificate first though.
Also, check the 'repatriation' details. Should the worst happen you will probably just want to get home ASAP!
Hope this helps.
Every Woman is entitled to understand what happened in her pregnancy when pre eclampsia strikes. I hope to be able to support that process.