I was given unprotected oral sex and had partially safe intercourse, meaning the condom was taken off half way threw the sex. This happened 5 days ago. How long should I wait to get a STD test so that is is accurate. I know I won't know for sure with HIV for 6 months, I just don't know about everything else. The reason this worries me is because a day or two after the sex I noticed that I have to urinate more often, and not getting as much urine out, and that the tip of my penis slightly burns. There is no cloudiness of the urine or any other discharge from it.