Starting to take medical marijuana oils as a combination of (18:0) and (1:20) to treat spinal stenosis and nerve pain. For a number of years, my daily medication has been (2 X 100 mg Codeine Contin) and (3 X 300 mg Gabapentin). In trying to withdraw from the pain pills, I am confronted with horrible anxiety and inside chills. I also fear that I might lose control and harm myself to get away from this experience. Is it the codeine withdrawal, the Gabapentin withdrawal, or the unknown effects of THC causing this? (I was prescribed the high CBD to offset the ill effects of anxiety, but left to flounder and experiment to find the right combination.)