18 days ago Unprotected blowjob, penis rubbing vagina no penetration.99.4 temp for 4day. Std/hiv neg at 15 days. Hiv early symptoms? What to do now?

Stop worrying. Your HIV risk is basically zero from this, your temp is not even a real fever, but if you're confident you're having symptoms ("HIV seroconversion is the worst case of the 'flu I ever had"), get checked for infectious mono. Use a condom next time because you're a gentleman. Cherish the memory of having shared love. Best wishes.