Given the experience of receiving oral sex with a condom on, I would say your risk of getting HSV is just incredibly low indeed! And the HSV that you would get form receiving oral sex would be HSV 1, not HSV 2 as you seem to know. If you did the blot and it was positive for HSV 1, I suspect it was NOT as a result of your sexual encounter described above. And a positive HSV 1 result on the blot would not tell you the location of your infection either.
None of your symptoms are worrisome to me at all and great news about the negative tests.