@joanng...I will answer the questions I can and I'm sure others will chime in to help you soon.You can feel better, but it will take some time. I had constant chest and back pain. The constant coughing continued until I found the cause of my lung damage- acid reflux. I had to change my diet and sleep upright. This cut down on the cough after antibiotics, steroids, and postural drainage (see You-tube) My acupuncturist diagnosed and successfully treated nerve pain and now I have been well for 2 years with only the occasional bronchitis.
Many of our members continue to work. I would suggest you analyze your work schedule for energy sappers, take naps and ask to work from home.
I had to retire in order to heal. Since you are 20 years younger, you will have a better chance of continuing to work if you make adjustments. Good luck!