For starters, I would have thought:
(1) You tested too early for any of the STI's that you had stated.
(2) The chance that this person had "all" of these STI's would be extremely RARE. (The person would be a physical mess to say the least)
(3) The risk for HIV was so extremely low and probably not even a concern...(search threads on "HIV and transmission")
(4) HSV1 and HSV2 probably would have only been the only concern that I would have thought. (Herpes Select test is a reliable test I think after 6 weeks?- Ask MD HHH)
(5) The irritation on the shaft may be contributed to friction, etc. (you should probably see a dermatologist....which, in my opinion, they probably see more of HSV 1 and 2 than GP because it is a skin condition).
Brian
The risks of STD from the exposure you describe were theoretical and low. Testing 2 days after exposure is adequate for gonorrhea and for chlamydia, but you couldn't have caught chlamydia from that exposure, so you can be sure you don't have those infections. Your testing was much too early for any of the others. But the only ones with any measurable risk at all were 1) genital herpes due to HSV-1, if your partner happens to have oral herpes and had an outbreak at the time (i.e., statistically unlikely); and 2) nongonococcal urethritis (NGU) related to oral sex, perhaps due to oral bacteria.
Your painful urination almost certainly isn't herpes. Conceivably could be due to NGU; the urine may give a clue about that possibility. Prostatitis often is a wastebasket diagnosis--that is, a word that providers often come up with to explain otherwise mysterious symptoms like your but probably greatly overdiagnosed. Your other symptoms (evanescent red dots, pubic area "on fire") don't suggest any STD and could be anxiety related.
If your symptoms persist and you're not certain about your GP's expertise, your local public health STD clinic or an infectious diseases specialist probably would be a better bet than the average dermatologist or urologist. But my bet is your urinalysis will be normal and that nothing more need be done at this time, except wait for your symptoms to fade on their own. None of the realistic possible explanations will ever harm you, your wife, or your unborn child.
Good luck--- HHH, MD