Can some/most people really control their thoughts all the time?

I find that almost all of the time, I can’t control where my mind goes. I’m going through something really horrible at the moment, and everyone keeps telling me the same things. Don’t dwell, don’t think about it, push it out of your mind, etc. Except, I can’t. Literally, I can’t. In fact, the more I try to make my brain stop going to that place, I swear it takes on a mind of its own is that a pun? and focuses even more on the The Horrible Thing.

Is this more normal than I realize? Or do most people actually have control over their thoughts?