Because we do not see HIV being spread to men receiving oral sex, it is not necessary to do anymore testing for HIV.
You did not say if you had done any testing for Gonorrhea, Chlamydia or Syphilis which are infections that can be passed when men receive oral sex. Testing in British Columbia, Canada would be conclusive at 90 for these infections but as you are in India you may want to check with your testing clinic to see if that is the case there as well.
Feel free to check out our Know your chances charts to see the chances of getting an STI from different activities.
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