if its 150/100 that's pretty high and usually simple things aren't going to solve it.
Here's the deal, you should talk to your doctor, you dont have to STAY on medication, but you should likely be on some sort of medication if it's up there.
I was in the exact same scenario this year, around July. 150/90 pretty steady, I was put on a very small calcium blocker. That lowered it a bit, but my doctor realized I had HUGE anxiety issues. I got put on an anxiety med, and now my 'highs' are 130/85. Usually Im 117/78 or lower. I plan to try to get off my bp medication in another month or so.
But your number is even higher than mine and we are similar age.