Risks for HIV are:
1) Having unprotected penetrative anal or vaginal sex, OR
2) Sharing IV drug equipment with other IV drug users.
Washing afterward, by the way, would do nothing in regards to preventing HIV, Herpes, or any STDs. However, you were never exposed to HIV.
This forum is only for HIV. Herpes questions go here: https://www.medhelp.org/forums/Herpes/show/195