Hey, sorry to learn about your decease......
Here I can share some info about medical marijuana used in chronic pain...

Marijuana has been found beneficial in the treatment of chronic pain. In addition to it's analgesic effects, it is an anti-inflammatory, and it can work synergystically with opiod medications. Unfortunately, although opiod medications are effective in treating the pain in the beginning, over time a tolerance can develop, and they don't work as well. Furthermore, research has shown except for the potential damage to the lungs, it is safer than many of the legal drugs used for pain.
After all, it seems to me that medical marijuana is a viable alternative in the treatment of chronic pain.

Wishes you best of luck...........