Trust your gut. Give the soupy feelings a week or two to simmer, if thinking you need that time is another gut feeling, but if it's still sloshing around afterward, stop waiting for it to go away because it's not going to. Spontaneous decisions are nothing to be ashamed of. There's always the slight chance you'll regret it, but if you're yearning so deeply for change that your stomach won't come out of the knots it's got itself tied up in and your head won't stop dreaming, day and night, about the possible outcomes of the choice you're trying to make, the post-regret simply won't measure up to the in-between-regret. You don't have to settle for anything; you have to live your life and you have to live it now, because anything can steal your life at anytime, and it would be terrible if it was stolen while you were wasting time in a chair you were antsy and uncomfortable sitting in.
Stand up and go find another chair, even if you feel silly giving up the coziest lean-back leather chair in the room. Maybe the wooden rocking chair across the floor looks a little rickety, but for some reason you know you're going to like it more. It's okay to relinquish a crown, it's okay to push a plate of cake away, it's okay to give up.
Whatever it is, go for it.