Over the last few months, our water bill started going higher and higher (doubled), and we would have high water pressure when we first turned on various faucets or toilets (it would go away after a bit, but pressure was really high at first). I finally looked at our regulator and saw that there was a very small amount of water on the adjustment bolt, dripping down.
I then replaced the regulator with a new one and the pressure went away completely. I also fixed a couple of toilets that were running/leaking off and on. The very next month my water bill was back down where it used to be (normal).
Over the last week or so, I've started to notice the occasional high water pressure (high when first turned on after a period of it not running at all followed by a normalizing of pressure). My wife was taking a bath just now in our master and texted me about a sound. I went up and water was slowly dripping from one of our bathroom sinks as well as the shower head. I turned on the sink and it shot out at high pressure, then slowed to normal. Turned it off and the dripping stopped in both the sink and the shower head.
I just went down and checked the regulator - it's dry, no water. Latest water bill came in; it's a little higher than before, but nothing crazy... appears to be about the same as last year.