I had unprotected sex 10 years back with a known girl, whom I am still in touch with. She's married and already has a kid. I haven't had any sexual relationship after that with anybody, now any sharing of needles.Now that I am going to get married myself, I wanted to do the HIV test. I did one in August 2013, and that was negative. Again this year as well, I did one in June, and again November, and both of them were tested negative. So what are the chances of me testing HIV positive? And should I go for the western blot test as well?