On 15 june, 2013 I had sex with a call girl. In between the act Condom got ruptured. i immidiately pulled out and washed my part in running water. i was worried if i m exposed to HIV. today, on September 20, i had Hiv 1/2 P24 combo test. (cmia) and index is 0.22. what does it indicates? i do not have any health problem so far. please suggest that do i need futher xamination?