So as a follow-up, in case any OTHER paranoid nurses out there search a similar situation. From the CDC: "The CDC does not list human breast milk as a body fluid for which most healthcare personnel should use special handling precautions. Occupational exposure to human breast milk has not been shown to lead to transmission of HIV or HBV infection. However, because human breast milk has been implicated in transmitting HIV from mother to infant, gloves may be worn as a precaution by health care workers who are frequently exposed to breast milk (e.g., persons working in human milk banks)."
I also called the AIDS Post-Exposure Hotline (judge me if you must) and the physician I spoke with said that this was an extremely...extremely....extremely...low risk situation. Apparently moms are tested during pregnancy...and if they're not, then the babies are tested at birth. An HIV+ mom wouldn't be breastfeeding, and even if she were, the risk of passing on HIV in milk comes from the fact that babies are consuming it in vast quantities as their only source of nourishment for several months...and even then, it's not a guarantee that it will be passed on. At one point, I told the Dr. that I had the distinct impression that he thought I was being paranoid and somewhat ridiculous. He said that he couldn't tell me there was NO risk, but repeated that this was not a situation where he would recommend prophylaxis, there are no documented cases of HIV being passed to an HCP this way, and repeated that this was an extremely...extremely...extremely low risk situation.
Considering the above information, and the fact that the infectious disease portion of the chart said, "Nothing notable," I'm going to chalk this up to (rather massive) paranoia and a lesson learned.