No risk.
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.
HIV is transmitted by;
Unprotected penetrative anal and/or vaginal sex
Sharing works with other IV drug abusers
Mother to child
the answer is NO
two reason why:
hiv is not transmitted through animate objects. once exposed to air, it becomes inactive and unable to infect.
"As soon as I returned to my car I noticed my fingers had cuts on them none of which were bleeding."
you had NO risk