I had almost every risk factor for preeclampsia when I was pg and I had about a million different doctors monitoring me. I also went for weekly non stress tests, which I found to be incredibly annoying.
One of the doctors I saw was a nephrologist who specialized in high blood pressure in pregnancy. She told me you treat HBP in pregnancy the opposite of how you would normally treat it. She told me not to exercise at all and basically take it easy when I could.
I thought I would be one of those people you saw at the gym exercising right up until my due date. I was very fit before I was pg and thought I could continue a modified version of my fitness routine, but she said NO.
I was on already on medication before I was pg and my bp was okay until the very end, then things went downhill quickly. I ended up having HELLP and had to have a c-section because they thought an induction would take too long. They were afraid my organs would start shutting down.
Don't mess around with your blood pressure. I think you're fine if the elevation is really due to stress at the doctor's office, but if you see it start to go up at home take it seriously.
If you got nothing to bring to the table - don't even bother sitting down.