Last month I was in Nigeria where apparently incidents of AIDS is very high. I am male of 47 years. I had unprotected oral sex by a female sex worker for 10 min or so. I did not notice any blood on my penis subsequent to the act. 7 weeks have passed. I have not got any fever. But have felt slight pain a few times in my armpits. Also, I had muscular pain prior to this exposure which continued. There has been no diarrohea. When I get up I feel dryness in my mouth which was possibly not ther earlier. Is there any risk of HIV. Do I need to test?