Help!!!!

Mary • Hello my names mary im 27my husband is 32 we have been married since this july 2015 been together since april of 08 we have two beautiful daughters ages 9 and 20 months

So I woke up feeling dizzy and when I lay down or get up I feel dizzy I checked my bp and it’s 175 over 100 now idk if o should freak out it’s in the middle of the night I have a doc apt Thursday I’m 29 weeks pregnant