he only solution is try big hospitals ,, yeah more expensive but they will give you all the documents you need ,, after you arrive to Thailand go to your appointment and after that you can follow up with different clinics if you want
i will give you a tip to meet normal women try to sign up in any type of classes sport, music, cooking, art, yoga, or volunteer if you are native English Speaker in schools it's good environment .... etc. it's not sure 100% but at least normal environment with normal real thai community 🙃 but this only will work out if you plan to stay long term in Thailand cuse dating take time my friend 🙂