Thanks for coming to HCM. As you mentioned that numerous tests were done for back/shoulder pain
which came inconclusive, you might simply be having painful muscles due to wrong sitting posture. As you indicated the type of job you do, and if you are stressed too, it is possibly due to that. If you would have had infection, it would have got better by now. Also, you mentioned of 'front of neck swelling'. Can you please tell us more about the location of swelling, consistency, pain, mobility of swelling etc? Also, did you get thyroid
testing done ? Please provide this information to us to help your concerns.
Wish you get better soon!