Actually I had a blow job with my boyfriend in the month of march-april. He tested in the month of january for hiv and the results were negative. He had his full medical checkup and all were normal. Even I tested in the month of may for hiv elisa tridot, vdrl, hbsag, anti hcv and all results were negative and nonreactive. Should I have to worry about getting hiv with my partner. I want to know the higher chances of getting hiv transmission through which activity. And what are the chances of getting hiv through oral sex and kissing.