Then if you are fearful that every girl you meet may potentially carry a sexually transmitted disease or diseases.
It looks like the only course of action before you decide to have sex with a woman, is to insist she go to a reputable doctor and submit to testing and screening for every type of sexually transmitted disease as a pre-sexual agreement, and present the test results to you signed by a qualified eurologist medical doctor.
That would prevent you from suffering mental stress and anguish of wondering if she gave you any type of diseases.
It looks like you answered your own question in your first and second post.