I just had less than what we call oral sex with my partner (girlfriend) yesterday.if I go into details we just kissed each other ,touched our genitals and I kissed and kissed / licked her body at certain parts (above the legs ).we stayed away from bjs and other things like that. Just after this when we left we both started feeling fatigue and pain in our muscles and joints and we are extremely tired since yesterday. I can not figure out what is this happening like can it be cmv or mono. But as far as I know these are spread by kissing only if a person have it already but none of us both had this we were healthy so why is this happening. Please help me out in this.