Feed them and give them 2 weeks. Don't visit too often; that causes them to slow down. Queens tend to be pretty resilient and can bounce back quickly.
Is it possible the screen on the queen wasn't exposed to the open part of the hive; the workers need to be able to feed her through the screen? Just a guess.
Is it possible the screen on the queen wasn't exposed to the open part of the hive; the workers need to be able to feed her through the screen? Just a guess.