Thanks Doc! Feel free to use me as an example :) I think about this and realize I am probably being a worry wart, after typing that out it even makes less sense that I could have something. Obsessing on the issue combined with the internet certainly are an anxiety cocktail :) I need to let this go and will work on it. The psychological side of this is more prevalent and common that the actual disease side isnt it?
Welcome back to the forum.
Initial reply, based entirely on the title ("Chlamydia") and the opening lines which I interpret as meaning you received oral sex with a condom: Oral sex is considered safe sex, even without a condom -- the overall STD risk is much lower than with vaginal or anal sex, and virtually zero risk for some STDs. One of those is chlamydia, which is rarely carried in the oral cavity and therefore rarely transmitted by oral sex. And with a condom that doesn't break wide open, there is absolutely zero risk for any and all STDs.
Now having read the rest of your quetion: Your mild symptoms were not alarming -- based on that fact and the nature of the exposure, I would have advised there was no need to see a physician or be tested for STDs, and certainly no need for antibiotic treatment. STDs do not cause testicular pain that comes and goes, especially without other symptoms such as abnormal urethral discharge. To your specific questions:
1) No STD, either bacterial or viral, causes such symptoms.
2) You need to stop treating yourself with antibiotics lying around. However, those treatments would have cured any and all bacterial STDs that you could possibly have.
3) This is a somewhat irrational "what if" question. It's pointless to speculate about something that obviously didn't happen! But the answer io that there still would have been no risk for chlamydia.
4) Another speculative "what if" question. You couldn't have caught chlamydia, so it's pointless and I have no comment about it.
5) Yes. Your symptoms are typical for genitally focused anxiety. I could use your story to teach medical students about it. (And maybe I will!)
6) This isn't an STD issue, so I have no comment on it.
Obviously you are suffering anguish, guilt, and shame over a sexual decision you regret, and that's the only significant health problem here. From an STD standpoint, you did not make any kind of "bad decision". It's human to seek sexual release, including commercial sex from time to time; and you did it with absolute safety, since you had only oral sex and used a condom.
I hope these comments have helped ease your mind.
HHH, MD