question on risk?

hello there, my question is that a few days ago i tried cocaine w/ a 3rd  cousin of mine whom i have not seen in about a year or so. i sniffed the cocaine just one time but it was right after he did w/ a $bill$.  i did not see his nose bleeding or really any blood on the bill either. i know for sure that my nose wasnt bleeding at all, but now im worried about getting hep c if he has it.  just looking for someones opinion how how risky that was and IF he did have it (he's much older than me) how likley it is that i could have caught it by sniffing that one time.  thanks in advance , i am not at all worried as far as other diseases is concerned w/ my cousin, he is been happily married for 15+ yrs w/ 2 beautiful little girls and ive been in a 3+ yr relationship myself.  other than in college  ive never done any drugs at all other than this time w/  him at a golf/ dinner party.  i didnt see any blood on the dollar bill or on him or me  i just got this crazy thought that maybe this could be possible and didnt know how risky it could be when there isnt any visible blood on the dollar bill and when i didnt have any cuts/scrapes inside my nostril  again thank you for your help...

[Douglas Dieterich, MD]

Not a significant risk. Sounds more like guilt and remorse than real risk. The risks are usually from straws with blood and repeat episodes. DTD