Yup, sounds like Bells Palsy. When I had it I wasn't diagnosed yet. The ER gave me a steroid taper and an antiviral.

It disappeared within a few weeks, but my one eye still droops slightly sometimes when I'm tired.

You should get it checked out just to make sure it wasn't a stroke. There is something about the forehead wrinkling when you try to lift your eyebrows??

The dr may also want you to tape your eye shut when you sleep to make sure it doesn't dry out and cause permanent damage.