I had 140/90 from about 34 weeks. I'd had a perfect pregnancy until then and felt perfectly well except for a dizzy spell the evening before going to the midwife.
I was sent straight to the monitoring unit at the hospital and spent a good couple of hours there. They monitored baby's movements and heart and tested my BP on an electric monitor every 10 mins for a good hour. There was a lot of waiting around while nurses saw to everything and everyone and while a doctor came to discharge me. I went in at 5pm and I think I was home by 9ish. Every time I went to the monitoring unit the first thing they would do was ask for a urine sample. They did feed me though!
The BP triggered weekly midwife appointments. The next week it was elevated again and I had to go to the monitoring unit again. This time I was there for the morning, the same tests and was put onto twice a week midwife appointments.
The next week, around 36 or 37 weeks, I had some incidences of good BP but then it was elevated again. Once more and to the monitoring unit where I had the usual shebang and an ultrasound to check the blood flow to baby and his size. Everything was fine, I was given 200mg of labetalol twice a day and booked in for an induction at 39 weeks.
I continued with the 200mg of labetalol and had to return to the monitoring unit twice a week until my induction.
Up until this point there had been no protein in the urine, no other symptoms of pre-eclampsia. The doctors and midwives diagnosed pregnancy induced hypertension.
The induction went ahead at 39 weeks with DC born at 39 and 2 in the morning. At that point it turned out that there'd been proteinuria while I'd been in labour and the doctors advised I'd had mild pre-eclampsia.
I'd rather hoped that I would get away without taking labetalol any more after birth, but I'm still on it. I went to the doctor 2 weeks PP however as my episiotomy wound had gotten infected and the doctor very happily dropped me to 100mg twice a day as my BP is now fine.
TL:DR - take a book and Netflix, BP monitoring is quite boring and waiting to be discharged somewhat stressful. Wishing you all the best!