First of all, thank you in advance for your time and service on this website.
I am a 32 y/o WM with no prior history of STDs, and have been in a committed, monogamous relationship for 3 years. Eleven days ago, while out at a bar, I met a girl who it turned out was actually transsexual. As we were both more than a little tipsy, we went back to her place. We kissed, she gave me unprotected oral sex, there was significant genital-to-genital contact, and we had protected anal sex (me to her). There was also a brief period where I rubbed my penis against hr anus unprotected -- probably no longer than 20 seconds. She said she was negative for STDs when I asked her (twice -- that night and again a few days ago).
Four days later, I developed a bad sore throat followed by flu-like symptoms, which included bodyache, dehydration, a bad cough and stuffy/runny nose. Fearing I got strep from the encounter, I used a leftover Zithromax prescription (1.5 g) to treat it. The sore throat and achiness have since largely resolved, although I am still coughing a little and slightly congested. However, about 4 days ago, I started feeling a tingling in my penis, generalized heightened penile awareness which borders on mild urethral discomfort (not specific to when I urinate, however), as well as needing to urinate excessively (approx once every 60-90 min, including at least one time at night). This is all rather unusual for me, although I do pee frequently, and I have no history of UTI.
So, I am now extremely worried about STDs, especially herpes. I have not seen any "classic" herpes sores or lesions yet on my penis, despite constant monitoring (believe me), but I know many people are asymptomic for sores and/or the sores can appear to look like small cuts, etc. (Which I simply can't tell if I have.) Any advice you have to offer will be sincerely appreciated. Thanks again.