@bbbogh It's interesting that both you and a few coworkers have the same symptoms. Are you doing a physical job holding your arms overhead? Is it a high stress job? I'm asking this because I have a condition that produces symptoms in my chest. When your pain starts at 8 or 9 AM, what are you doing that might be bringing it on and how long time wise were you doing this? Do you think it could be work related? Are you and the coworkers who have the symptoms doing exactly the same job? Does this happen on your days off? Is it positional or does it come on with a certain posture? Do you get breaks to stretch at work? Are you practicing good ergonomics at work?
What I have is thoracic outlet syndrome and it is aggravated by bad posture and it becomes a problem through incorrect use of muscles that causes a nerve entrapment in-between the rib cage and collar bone. It causes my neck and chest muscles to be too tight and can put a muscle spasm right into my chest. It affects my breathing and I start using my neck muscles when I have trouble breathing which I do because of asthma instead of breathing from the diaphragm. TOS can cause pain radiating to the arms and cut off circulation a bit, but it also puts an ache into the front collar bone area, and you can have it on both sides. Often it is worse on one side. It might be worth asking about, but you would need to see a neurologist who understands it, and a lot of doctors don't and they think it is rare. It's not rare. Look for a medical center where they treat TOS to find a specialist who is familiar with it. If you have this, physical therapy helps. My PT does a lot of manual work with myofascial release. See myofascialrelease.com for info on that. If it's a physical problem, that would make sense that the inhaler and antibiotics didn't help. You can also be allergic to molds even though they have tested "low" in the workplace. Molds cause airways and lung tissues to swell. I feel that when I have problems. Here is some information on TOS https://www.mayoclinic.org/diseases-conditions/thoracic-outlet-syndrome/symptoms-causes/syc-20353988