If anything, this makes your risk for infection lower. Does not change my assessmetn of advice however. EWH
thanks for the comments. the amount of partners was over roughly a seven year period. does that change your thoughts on the matter?
Welcome to our Forum. You ask an important question which I'll be pleased to address. Before I do however, let me say that having sex outside of your ongoing relationship with a new partner without a condom may not have been one of your wisest moves- please use condoms in the future if you are going to go this route, it will save you a lot of heartburn.
Now, your risk. You are correct that STDs, including both HIV and herpes pare somewhat more common among African Americans than whites. The overall figure from the research performed on populations thought to be representative of the entire population is that the risk of having any STD is increased about 3-fold among African Americans (FYI, this is not a function of genetics and susceptibility but a manifestation and legacy of the uneven distribution of health care in the U.S.). For your partner however, he greatest risk factor is not that she has had other AA sex partners but that she has had 19 of them (you don't say over what period of time). Did you happen to ask her if she'd been checked for STD, if so which ones and when- if not, I would suggest this as well since this will be useful information.
Having acknowledged that your partner was somewhat high risk, I can now say that despite that, your risk for infection remains rather low. Even most high risk partners don't have STDs (including HIV) and it is unusual for a person to get an STD following a single exposure even if their partner does have HIV. If she had HIV (quite unlikely), your risk from a single exposure is less than 1 in 1000. Your risk for other STDs however, since they are more common, is somewhat higher. Thus, here is my advice. To be safe and despite your low risk for infection, 3 to 4 days after your exposure you can be checked for the most common STDs, gonorrhea, chlamydia and NGU. this can be done confidentially at your local health department or by your own doctor. Your risk for HSV is low and is not something to worry about unless you develop sores at a site of exposure - there is no reason to test for HSV. Similarly, your risk for HIV is VERY low. While I would not worry about it, to be thorough, I suggest (and think you will want) to get an HIV blood test 6-8 weeks after the exposure. if this is negative, as I am confident it will be, then you have nothing to worry about there either.
I hope these comments are helpful. EWH