Anxiety
I have suffered bad anxiety in the past and yes it can be physical I have not experienced it the way you have but I get pain in my arms shoulders and chest area due to me being so tense I got huge relief from walking in fact thats what my psychologist told me to do walk walk walk and it really did help me relax but it did take me 2 weeks to get any relief from it .
I wish you all the very best anxiety sucks
I wish you all the very best anxiety sucks