N T A for determining that this doctor isn’t the right fit for you, but soft YTA for questioning her competency.

I understand you were trying to advocate for yourself, but it isn’t unprofessional for a physician to express repeated concern about drug and alcohol interactions - and she should care more about the health impact of casual drinking while on an anticonvulsant medication than a non-medical professional not tasked with your care would be. I’ve been prescribed gabapentin for quite a while to treat panic attacks and it is typical to ask about alcohol consumption as a part of standard medication maintenance discussions/appointments. I still have the occasional drink, and every time it comes up my doctor reminds me that I should not be drinking while on this medication and confirms I do not take it on nights I may have more than a single glass of wine. It isn’t a character judgment - it is straightforward medical advice.

Now, if you truly did disclose once that you averaged 9 drinks a week and she immediately and without further discussion diagnosed you with a substance abuse disorder and recommended AA for treatment, I would have a different opinion … but if she recommended you not drink at all on gabapentin, you made a non-committal or dismissive response (…for example, that your mom doesn’t care that much about your drinking), I don’t think it’d be that out of line for her to mention resources you could leverage if you needed support in quitting.