So now you may have a new viral infection. Do you think that every cold, every muscle twitch, or other new medical symptom the rest of your life will somehow be related to that kiss? Nonsense. In any case, neither mononucleosis nor any STD would cause such symptoms for this long. None of this has any connection with the kiss 5 months ago, except for the possible psychological connection noted above. Believe it, accept it, and move on.
I appreciate your attention sir but until now I'm sick, I'm having sever headache for 3 days now and my throat is hurting, lymph nodes mild pain and my muscles and joints just don't stop hurting and twitching ! Does mono cause such symptoms for more than 5 months?
Kissing doesn't risk STDs, and no infection of any kind -- STD or anything else-- can cause the symptoms you describe. Neither candida nor HPV would cause such symptoms, and neither of these is acquired by kissing. Your symptoms are unrelated to the kiss 5 months ago, except that they might be due to anxiety over that event.
Good luck.