Yes! Its scary, hey? I am about 16 weeks, and I started on Labetalol (2 x 100mg, twice a day) as my bp was steadily at 155/110 at my first checkups. I didn't know I had high bp as I wasn't regularily checked up with my family doctor. I actually had to visit the ER a few times with weird symptoms, like blue toes (gross), headaches, numbness, etc. Finally, when I knew I was pregnant, I got the blue toes and went in, and they treated me with medication.
I also had PIH with my first son, and he was induced at 38 weeks. MY second pregnancy was just fine (minus the surprise breech entry into the world my daughter made!), and then sometime after that, my bp crept up and up - I had no idea!
Now, I monitor my bp at home, and take the same doseage of Labetalol as initially prescribed. I am constantly exhausted, and it took me about three weeks to get used to the side effects of the medication - headaches, rashes, fatigue, dizziness, short of breath, nausea, etc. I get regular headaches, and if I have a hot bath, my bp goes REALLY low and I get wobbly. If I stand up too fast, sometimes I black out for just long enough to fall over. My OBGYN says this is just my body getting used to the new pressures, and the enlarged arteries.
At the end of the day, I am relaxed knowing my pressures are regulated, my baby is healthy, and I am on the fast track to helping myself get better with daily walks, swims, and a low sodium diet.
Good luck! 8)