dear doctor:i have tested hiv ab several days ago in local cdc and was tested negative. but i washed my injury with tap water in cdc‘s toilet right afer i finished that. i am so afraid that this action will cause hiv transmiting,if hiv carrier droped their blood in tap water . Even several doctors and stuff from cdc told me this action have zero chance to transmit hiv, i still in a panic. i have 2 questions, will this action have a chance to transmit hiv? what should i do to stop this panic?