35 weeks and my doctor wanted me to start taking my blood pressure twice a day, one laying down and one sitting up. I’m not sure if my blood pressure machine is broken but this is what it’s looked like so far-

118/85

120/86

115/89

90/59

not gonna list them all but you get the idea

then sometimes i’ll just get error messages. i bought another one and it was giving the same, if not very similar numbers. I’m not really sure why it’s doing this? i’ve done my own blood pressure for years and never had problems until this last week. Any ideas on why it could be fluctuating like this?