Well on 7/02/08 I had protected sex with a previously unknown female that I had met over the internet, I engaged in vaginal and anal fingering as well as normal vaginal sex, I made sure straight after that I cleaned up well and showered washing my hands well, I noticed when I was washing my hands that I had peeled skin around my fingernails area that was showing the first or second layer of skin peeled in small areas, I saw my doctor some 4 weeks lateer and got a HIV blood test which came back negative my doctor told me that I would not need to retest as I had engaged in safe protected sex and that I would not need to retest. is it possible to catch HIV by fingering with the first few layers of skin peeled on the fingernail area ? would it be safe to donate blood for me now ?