Thank you guys for your feedback. However I've seen in some other websites such as AIDSVANCOUVER Canada that Receiving oral sex is considered a negligible risk but not ZERO RISK. Still they claim that there is no documented cases which has been infected by this way. Thanks again
The doctor was right, you were never exposed to HIV from oral sex. You never required a test because your exposure was non existent, therefore you will always get a negative test, irrespective of the time passed