Painful neck

I was diagnosed in Oct by a skin biopsy to have skin sarcoidosis. I’ve seen been told by my pulmonologist I have a few nodes in my lungs but nothing to be concerned about. However for the past month in a half I have a sore throat. By thd end of each day I swear the next morning I’m going to wake up sick, yet hadn’t seemed too until today. Today the neck pain is unreal, it feels like whiplash, but sooooo tender to the touch! It’s obviously my lymph nodes that are swollen so, I’m fighting a cold? Or have been fighting a cold for a month? I did find one hardened node on the left side of my neck (only one hardened node one tho) My only other cold symptom besides all this neck & throat is a plugged nostril on and off lol (that only started today tho). Because technically I haven’t been diagnosed with any other sarcoidosis besides skin, should I even think this is linked? Do this tenderness go away soon? Or is this weeks? I appreciate any of your comments/ feedback friends