uuh, I am male, my case is that 1 year ago, i had a unprotected oral sex with a sex worker and than had a protected sexual intercourse. After that, i was very worried about that i was not sure whether the sex worker had been hiv infected. 5 weeks later, i went to CDC having test, the resutls was negative. at that time, i had another protected oral sex and protected sexual intercourse with a sex worker. another 5 weeks later, i went to CDC again to have test, the resutls was negative again which means 10weeks passed before my first sexual intercourse with the former sex worker, and 5week passed with the later sex worker. I would like to know, nowadays, whether i have necessity to go to CDC for a test again.