“What are the chances that an STI or STD will be found if you get examined?”
It would depend on when someone was exposed to an STD. For some STDs, it takes time before they can be detected. This is why it is so important to use protection with every sex act. Latex condoms offer the best protection and your health care provider should be able to provide you with information about the different STDs: how they are transmitted, how to protect yourself as well as signs / symptoms of an infection and what treatments are available.
We hope this helps!