Yeah, that combo definitely can be something else, and in your case it definitely is something else.

Anxiety can cause it, even if you’re not actively panicking, your body can still be in that state, especially if you deal with anxiety a lot. Muscle tension, acid reflux, or even a change in your breathing pattern can all cause the same feeling.

The way you described it actually sounds like the opposite of how heart related symptoms are described. And you don’t have risk factors either.

I wouldn’t worry, especially since it hasn’t gotten worse, hasn’t been persistent, and didn’t come with fainting or anything like that.