Yes about the computer! I have had this since about May/June last year -- after I was diagnosed with adult mono. Had neck stiffness and things seemed to travel from there.Honestly, I don't take too much pain medicine because I have acid reflux and most bother that, so basically it's Tylenol. The pain is more of a pressure/discomfort/bothersome thing than an I'm in severe, stabbing pain.
The pain is also under the left arm/armpit area.
Sorry, I also do have some numbness/tingling/pain at times in my arm.