You have very low chances with two appointments from random clinics... You'll need a proper medical treatment plan on the long term from a reputable hospital/clinic. It may have worked before but it's not anymore.
The ask:thailand community, consisting of multiple Q/A groups with over 100,000 members, powers this platform. It is not an official government resource. Our members actively contribute to this resource, and while we strive for accuracy, we cannot guarantee its complete reliability. Assistance to travelers is provided as a community service.