I feel like my mouth is slowly sticking out.

My upper front teeth are large and protrude, but my upper and lower mouth closes well.

I didn't think it protruded that much when my mouth was closed, but when I glance at it with a blank expression, it seems like my mouth sticks out.

Maybe it's because the corners of my lips are drooping, but it looks like my lower lip is drooping and coming up.

I'm wondering what I can do to make my mouth look a little less tight in this situation.