My right eye was elbowed after PRK surgery. Will it heal properly?

First of all, I would recommend that you return to your PRK doctor, or at least an ophthalmologist or optometrist, rather than urgent care, which are not eye doctors. But getting elbowed should have no long-term effect on your PRK results.

Sorry to hear about your injury. 
Without knowing whether the comfort or vision was affected, or how long after surgery it was, it's hard to say.
Most of the time it ends well if a consultation with the surgeon is done in a timely manner.