Will my slightly droopy eye lid go away after swelling from dental surgery?

1 1/2 weeks ago I had dental surgery to remove the remainder of a tooth which had already had a root canal and crown. I received anesthesia. There was some swelling to the right eye area (surgery was on the left side upper) & gum & I did as instructed, ice 2 days and then some heat. No pain. My right eyelid is slightly drooped lower than the left now and that has not gone away. The Dentist/Oral surgeon said at the one week check up that I probably slept on it. I did but it has not yet gone away. ??????