Sexual health is very important, and sexually transmitted diseases can spread between different sexes. You advised him to have an examination because you were concerned about his performance, but your expression may be a little extreme or inappropriate.
You can apologize to him and show your concern. Tell him that you didn't attack him maliciously, but for his health and safety. You can try to express your thoughts in a softer tone, such as "I know our sexual behavior is voluntary, but I care about your health." We can check together to make sure that we are all healthy. "
In addition, it is also important to respect each other's privacy and personal space. If your boyfriend doesn't want to have a prenatal examination, you should respect his decision and continue to communicate with him frankly and openly to ensure each other's health and happiness.