I'm losing my mind

I don't know what it is. My mind feels like an endless loop of thoughts. I can't take it anymore.

It's like my mind is in permanent speculation mode. What if what if what if. They say that doing the same thing over and over again is the very definition of insanity.

Being stuck in the same place. Doing the same things. Thinking about doing different things but still doing the same things. Because routine brings comfort, right? I'm a creature of habit. I don't know if it's a good or bad thing.

Being stuck here in this place, in this mindset, it's driving me nuts. I don't know if this is anxiety I feel, because I feel calm. But something doesn't feel right in my head.