Hello dear,
First of all please do not get concerned with the possibility of
lung cancer.
Based on the fact that the pain subsides on lying down & chiropractic treatments, the symptoms as mentioned in your post can be attributed to musculo-skeletal pain.
Symptomatic relief can be obtained by application of
analgesic &
muscle relaxant gel, intake of analgesics like
Diclofenac (to be taken after food) +
Pantoprazole (to be taken 30 minutes before meals).
You can include supplements of Calcium & Vitamin D in your diet which will help in strengthening of bones.
If it still persists, an X ray of chest will be needed to rule out any pathological cause for the symptoms.
There is no need to worry, you will be fine.
Till then, maintain adequate hydration & nutrition status, take proper rest and avoid stress.
Wishing you a Good Health.
Take care.