Sorry for your troubles. If anything unusual or symptom doesn't go away in 2-3 weeks, if should be looked into by a doctor. I had a number of different palpable pea sized nodes through the years, and non nodes, that I went to my oncologist or ENT in less time than that, which were biopsied by FNAB. Hopefully it's just that, a reaction to the cold, and a good sign it can no longer be felt.
Good luck.
