I'm so sorry you are going through this. It can sometimes take a little longer for BP to go down after pre-e for some mommies. Although I went home a day after DD was born, I could only go if I agreed to monitor my BP by taking it every three hours and logging it for 2 weeks after I was sent home. It stayed high for a while if I remember correctly. They had me taking water pills when I went home, too - not fun. Praying your BP stays low enough for you to be home with baby!
Dayna (37) DH (38) DD (6) DS1 (3) DS2 3-31-14