Hello I got a question about if I can get a case started

I went to see my pain management doctor and he said he was withdrawn me from his office cause I tested positive of marihuana when I don’t even smoke and I notice in the lab results they say I have morphine in my system as well when I’m allergic to morphine🤔I when the same day and did a drug test at another office paying out of my pocket and it was all negative of all drugs , now the doctor was saying my insurance wasn’t covering for his service put in order to be seen in the office I would have to pay $65. For physical therapy in the same office way before I make a complain to my insurance about that and they call the office now they stateding that the $65 it wasn’t for therapist it was for the doctor fee and therapist now they remove me from my primary doctor as well in the same clinic ,is there’s a way I can proceed to legal law suit cause they are stating that I when to the office arguing when I wasn’t and they do have cameras in the office.