If you are on bedrest, the idea is to limit any kind of activity that could increase your BP. This includes driving a car. To be sure, you can ask your doctor, but I'd think probably not, especially since your BP goes up just when sitting up.
How far along are you?
MC 3/2009 and 3/2011Henry
(1/1/2010-1/7/2010) - forever loved and missed; severe PE with Hellp; partial placental abruption, classical c-section at 25.6 weeksMatilda
(Nov. 2012, born at 35.4 weeks) - severe PE
Our pain has been put into words, placed into empty cradles, to remember that all our babies lived, that they mattered and always will. - Field of Cradles http://www.fieldofcradles.org/