I had high blood pressure

I went for my usual medical for the drivers licence and I had high blood pressure – 150 /90.
So I had to go back the next morning for another check. I was wishing I had emailed earlier and got the low down from you on lowering blood pressure mentally.
But while I was waiting I thought well I’ll just try something – it might be better than nothing.
So I went to my PP and after settling into my armchair, in my mind,  I reached over and turned a tap on the wall that regulated my blood pressure at the same time setting the gauge to 130/80 and then I turned it further to 120/80.
Now the thing is I have no idea whether this actually affected anything or not … but because I was in a rush to get to the doctor’s I thought I might have had elevated levels to start with.
When she took the pressure it was 129/79, which put an end to talk of medication for high pressure.  BC,  W.A.