You should have mentioned that to him. He could have had a better way to diagnose your problem effectively. But I do not think it could be a std. just a burning sensation? But, get it looked at.
No other syptoms, and I don't think he looked into other reasons---I did not mention the unprotected oral
Unprotected oral is low risk but not a no risk. You can get an std from oral sex such as gono, chlamydia, herpes. HIV is not possible though. Most experts would agree that HIV through oral sex is barely transmissible. I do not think you would have a std because symptoms do not occur the next day. Typically, 2-3 after exposure would you have symptoms. The urologist ruled out UTI, which is good but, did the urologist look into other reasons as to why you may be feeling this way? IF there are other symptoms that follow this burning sensation, then, get it checked out right away if possible.