I Was Recently Stopped By Police. As A Part Of

I was recently stopped by police. As a part of his " field sobriety test" , the officer looked at the back of my throat . From this exam he started that I was I Mariana or meth user. I assured him several times that this was not the case. I do smoke cigarettes however I have never used meth and the last time I used was pot was 35 years ago. I am a male, 53yo. Narcolepsy