hello Dr ,i am a chinese. three months ago ,i had sex with a girl at a bar.it was oral fellatio without condom and vaginal penetration with condom .i had diarrhea and had a bad cold on the second day.i did hiv duo test in four weeks later and two months later.all the results were negative but my symptoms were constant.my symptoms are full body muscle beating ,full body joint sounds,chills of chest and back,tight forehead.i found many chinese net friends and we have some similar symptoms. they call the disease"Yin zi" just like "yin aids‘’.people with this disease have similar symptoms . But the goverment says it has nothing to do with hiv and just is psychological reasons .many people also believe that unknown viruses or "yin zi" exists. we are very helpless .we want the same healthy life as before.