Welcome to the forum.
The most important part of your question is your test results. They prove you did not catch HIV. And I mean truly prove: it is impossible you have it. The blood tests (including the rapid fignerstick test) are entirely reliable at 6 weeks, despite official advice to wait 3 months for definitive results. For more detail, see the thread linked below:
http://www.medhelp.org/posts/show/1704700
But even if you had not been tested, I would have reassured you there was no chance you caught HIV from the exposure described. And your symptoms also are not particularly suggestive of HIV. (They are, however, typical for the physical manifestations of anxiety, stress, or other psychological issues -- which would be consistent with your concerns over a sexual decision you appear to regret.)
As for your wife, HIV has never been known to be transmitted by cunnilingus (oral-vaginal sex); and as already discussed, you definitely do not have HIV. I'm sure her symptoms are entirely unrelated to your sexual indiscretion.
So don't worry at all about HIV. If your or your wife's symptoms continue, of course you should be professionally evaluated. But there is no chance this is HIV from the events described.
Best wishes-- HHH, MD