I would be more worried about a couple of other things you said, I have met someone, and I am opening a business. After 50 yrs of being around Thailand, all I see is another Farang being set up for a fall. You may be the exception, but Thailand does have rules and you are breaking several of them, be careful!!
I have an app, that lists all my scripts and medicine as well as my wife's, I only had to use it to show a doctor here what she was using. Customs have never bothered to check, we come and go twice a year
For a start you. will need your original birth certificate, it has a registration no, that will identify you on the national database. If one of your parents is Thai you are Thai. If not you may qualify depending on how old you are, as they changed the rules. Good Luck