What your physician told you was correct; no one can diagnose this STD by simply looking at the sample.
Testing for this bacterial based STD requires checking for the actual agent (the bacteria) connected with this; thus, it is very likely that, if infected, your test after one week would certainly have found this UNLESS swabbing the area just happened to miss picking up the bacteria.
Also keep in mind that in order to transmit this STD your partner would need to be infected with this in their oral cavity at the time they provided the oral sex to you. In other words, if they were infected in their genitals...and the only sexual contact with you was the oral sex...they could not pass this STD on to you.
I hope this makes sense as you wait for your test results.
No one here can tell you what your chances of getting herpes from this encounter are, especially since you did not indicate whether this person had this orally or on their genitals. If on their genitals, it would appear your risk is limited since you mention very brief penetration (again, how brief is not indicated).
If you remain concerned then consider antibody testing at the three month mark.
2. Not really. Swapping saliva (even if your partner is HIV positive) is not a risk for HIV transmission.
Keep in mind that in order for HIV transmission to occur during kissing, your partner must be HIV positive (of course) and producing bodily fluids that contain the virus AND you must have an OPEN portal into your body for the virus to enter. This would mean an open (as in bleeding) wound, cut, sore, lesion, etc. in your mouth at the time of the lip locking as well as a partner with a bloody mouth at the time of the kissing.
In other words, unlike other STD's which require only contact with mucous membranes for transmission, HIV must be able to actually enter your body for transmission to take place.
This makes it one of the most difficult STD's to pass on to another person. And why simply kissing someone (even open mouth kissing) is not really considered a risky behavior since most folks don't kiss with bloody mouths.