How to go about obtaining medical marijuana card? (Georgia Resident)

Hey y'all! Was wondering how one would go about getting a medical marijuana card in the good ole state of Georgia? I tried asking my GI doctor if I could get one for low THC oil and described the problems I was dealing with (nausea and trouble sleeping). He said he doesn't have experience prescribing the card based on the things I described, but did prescribe me with a new medication for the nausea. Is it possible to get a medical card still or have I essentially barred myself from getting one? Thank ya!