i went to a barbing salon to bar my hair,when i got there the barber used brush and an liqiud to sterilize theee clipper both the back and the front but i don't think the brush toucheed the tip of the blade of the clipper itself and when he was barbing my hair the clipper made a cut at the back of my head,am scared because after a few weeks latter i got a swollen node on my neck,am scared of hiv please am i safe? and if yes why is the swollen node there?,i also feel pain by the flesh by side of my cheek!please answer my question!Thanks!