"I have constant pain in back and hips and legs."
The ideal treatment for chronic pain is a 1:1 CBD/THC, and in your case, I would recommend a Sublingual Tincture or Capsules. In addition to pain relief, Medical Marijuana (CBD specifically) has a potent anti-inflammatory effect which can help improve lung function in people with inflammatory lung diseases.
https://www.tandfonline.com/doi/full/10.3109/08923973.2014.976794?needAccess=true
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2664885/
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