I would definitely see your doctor. My blood pressure slid up and up as well. It WILL fluctuate during the day. This is why when your doctor monitors you, they have you take your bp three times a day around the same time every day to chart it. If you showed up at your doctors office and they got a reading of 166/92, they'd talk about the hospital. That's dangerously high. How do I know? I showed up at the doctors with that reading. gulp. I did not go to the ER (I'm a bad patient) but I started blood pressure medication that same day. My bp immediately went down. I had ranged in that 140 range for a while which is considered prehypertension. And you get up near 150 on a regular basis, you will be diagnosed hypertensive even if part of the day it is lower.
My doctor says I have 'bad genes'. ha. I have familial hypertension. No matter what I do, I'll likely have hypertension in the end needing to be controlled by medication. This could be you.
I avoided a pill forever. I was terrified of it for some reason. But, I started losartin at a low dose. Do you know how much better I feel? You don't realize how having that high bp even part of the day takes its toll on your body. I physically felt better. I also lost a bit of weight.