I had my unwanted hair on my cheeks removed by threading at the barber shop. At the end of it, I saw a drop of blood on my cheek. I wiped it away with my finger but then I couldn't see a scar or anything that shows the source of blood. I believe it was just blood from one my hair roots. I wonder if it is possible for me to get hiv from the saliva on the string if the barber had some scars in his mouth.
I know this is a long shot and might seem weird but I am really worried, thank you for your attention.