hello doctor, actually I have a question regarding pricking myself by a solid iron nail(pin) in public bus.It is been 4 months and I have no symptoms like fever etc. but now after this much of time spend I have a problem of headache but no fever or flu like that.The pin was not rusty, So in this case there is there any chance of HIV. please help me by giving this answer because I m very nervous and thinking all day about this. plz sir thanks in advance.