No ! HIV does not transmit, the way you are thinking. You never had a risk.
May I ask why I'm not that familiar with all the risk
Touching your arm with blood on her finger will not transmit HIV
What if the same place she put her finger is the same place she stuck the needle. That's my biggest worry
Its still no risk. HIV when exposed to air becomes inactive, unable to infect.
Your risk would be from unprotected sex, sharing needles for drug use, or mother to child
No way no risk. Dont worrie move on with your life.