Your symptoms are not typical for herpes and almost certainly are not due to HSV or any other STD. They are typical for anxiety magnifying normal body sensations, especially since doxycycline made no difference. Also, as you apparently already realize, there is no STD in the world that can cause symptoms 10 hours after exposure; herpes and every other STD require at least a couple of days. (Gonorrhea sometimes can cause early symptoms as quickly as 24 hours, but that's the only one that can come on so fast.) (No, you don't have gonorrhea.) HSV-2 cannot be acquired by fellatio, except for the very unlikely possibility your partner has oral (as well as genital) HSV-2 infection.
It seems you are more stressed over the possiblity of catching herpes. At some level, clearly you are not "willing to accept it". In any case, I suggest just sitting tight, and going on with life in the 100% confidence you have no infection. Or follow up with your health care provider if the symptoms persist and you remain concerned.
Good luck-- HHH, MD
I think this goes with this thread. If not, please accept
my apology in advance.
If a woman masturbated while performing fellatio getting
vaginal fluid on her hand and made contact with the genital
area or the penis with that hand, would there be a risk of infection?
Hand-to-genital STD transmission has been addressed on the forum many times. Theoretically yes, but too rare to worry about. See my second response to JustAWorriedGuy in the thread immediately above this one. If you want to carry on a dialog on the topic (without me), please do it on that thread, not this one.
HHH, MD