Thank you very much for the useful information.
I dont see any reasons for the antibiotic to be started.
This is just an anxiety issue. You need to focus on the anxiety treatment, and the good thing about this is that you yourself realize that this is all Anxiety.
And if just for a moment let us presume that you have an infection (epididymitis), even then there is no need to worry as this is a completely curable problem and not life threatening at all.
Given the fact that you do not have any symptoms, that you have protected intercourse, and with negative tests, I do not see any reason to panic at this point, and also there is no need for any antibiotic to be taken at all.
Stay relaxed and if the anxiety issues are severe, you should focus on that and get your anxiety treatment reviewed.
I hope this clarifies and answers your question.
It was a pleasure assisting you and thank you very much for visiting us.
My goal is to provide you with Excellent Service - if satisfied with the response, Please do not forget to Rate my service.
If you feel you have gotten anything less, please reply back, I am happy to address follow-up questions.