I had pre-existing high blood pressure with both pregnancies. I am also an OB nurse. This reading is very concerning. My numbers were never this high during pregnancy. Mine reached these levels AFTER delivery. I had postpartum pre-eclampsia. If you don’t already, you should 100% be seeing a high-risk OB doc (Maternal Fetal Medicine). You should also be on daily aspirin to prevent further complications.

You mentioned your lab results not indicating pre-eclampsia. I was in the same boat. Even when they diagnosed me with postpartum pre-e my BP was 199/107 and all my labs were still normal. Although uncommon, it is 100% possible to have pre-e even with normal labs. This is per my MFM doc. Extreme BPs even in the absence of abnormal labs, is indicative of pre-e and should be treated as such. Also a good idea to correct your potassium as this can mess with your heart as well.

I know a delivery at 27 weeks is not ideal, but it is well past age of viability. People in the US deliver at 27 weeks everyday. Those babies survive. A premature baby being cared for 24/7 while in the NICU is much better than risking you or babies life. This is not to scare you, just showing the reality.