Pregretting

verb: Regretting something in advance of having done it.

example: Every time I go to get my hair cut I have the same feeling of pregretting. My hair always seems to look so perfect before they chop it off, and I say to myself: “I’ve just got it to the stage I wanted, I should leave it.” It’s like buyer’s remorse in reverse. But in the end I know it is time to lighten the load and take a chance on change.

etymology: [Modern English] Ryan was talking about pre-regretting his hair cut, and Josey suggested "pregretting."