Could I loose my cdl license and my job after a drug test that came up positive even with a dr.s prescription for all the medication that showed up?

by Christal
(Beaver Falls Pa USA)

There was an accident nobody hurt wasnt my fault but company policy is to be drug screend after any incidents.

I am prescribed by my treating physician for these pain meds for chronic pain and they showed up (of course) but drug screen Dr said I passed but then turned me into company saying that I failed.

Will I loose my job or my CDL? I need my CDL for this job but there is also other job duties I could and also do?

Any insight will be appreciated.