You should be evaluated for preeclampsia.
Your urine needs to be checked for protein, and as you say, you should be evaluated for a possible early delivery.
Did you tell your midwife you are having severe headaches? You are exhibiting classic signs.
I'd get these answers today -
I'm 35 weeks as well and have been dealing with the same issue. My doctor doesn't play, when my pressure gets high like that especially when accompanied by a headache he will send you to l&d for at least 24-48 hours for monitoring. I've been hospitalized twice for this, actually just got released today. I think they should take it a little more serious as it could cause potential problems for you and baby. I'm on strict bed rest by the way