HIV is unable to reproduce outside its living host (unlike many bacteria or fungi, which may do so under suitable conditions), except under laboratory conditions; therefore, it does not spread or maintain infectiousness outside its host.
No risk what so ever.
Thanks, Teak. One last question: There is a chance that I touched myself repeatedly after I fingered her, and vaginal secretions on my hand would have therefore touched the head of my penis. Does this increase the risk? I am uncircumcised. Would being uncircumcised make the risk greater, thus needing to be tested? Or, again, no risk whatsoever?
No risk at all. You do not need HIV testing.