As you point out, you have posted on the wrong site. Questions about HIV belong on the HIV prevention site. Since much of your question has to do with molluscum contagiosum, I will do my best to answer your questions with this reply but, if you have additional questions or follow-up they must be on the HIV Prevention site. Sorry.
Before we get to MC, let's assess your risk. Despite the fact that your friend has been described as a "wild girl", her risk is still probably not nearly so high as a man who has sex with other men or a person who uses IV drugs. My guess is that her risk, while modest, is still not exceedingly high.
Now for MC. As you know by now, MC is a viral infection passed from person to person by close contact. The virus that casues it is common and many people have this infection. The connection with HIV comes for people who have MC and advanced HIV infection. In this situation, the infection becomes harder to treat and may become widespread. That you have MC is by no means indicative that you have HIV.
Finally, regarding your HIV concerns, you have negative HIV blood tests which were taken more than 12 weeks after your exposure. In this situation well over 99% of HIV tests that are going to be positive after an exposure will be.
Bottom line, you do not have HIV and have nothing more to worry about from the exposure you describe. Take care. EWH
sorry i just realized this was the wrong column, apologies.