7 days ago I went to planned parenthood to get a rapid test done, when she pricked my finger she gave me a cotton ball to put on my finger because it was bleeding. As she was handing me the cotton ball I saw that there was blood on one side of it, I didn't have a problem with it because I assumed that it was my blood, so I used the other side to hold my finger. The problem is, is that I cant remember if she had wiped my finger before; resulting in blood being on the cotton ball. Now I'm being paranoid and I'm thinking what if it was someone elses blood. What is my risk of getting hiv if the blood on the cotton ball was from an hiv + person and i applied it directly on the prick on my finger?