Does she have any swelling in the mouth?
Is the nostril on the swollen side clogged?
You may have to try to tube feed her.
https://www.backyardchickens.com/t/805728/go-team-tube-feeding
Try flushing it with saline and see if that will help. You might have to apply a warm/wet compress to help loosen it up. If you see anything in it flush it some more or try a wet qtip to help work it out.
You can also apply some Vetericyn eye gel or Terramycin eye ointment in the eye if it seems...