Your doc must have sucked. I had my vasectimy on August 28th this year I didnt feel a thing. They first used some type of numming cream on my sack, then gave me about 6 shots with a pnuematic tyoe deal still didnt feel a thing and then gave me the shot with a needle, and still didnt feel anything. Friends of mine have told me that when they pulls the tubes out it feels like they are pulling them out of your stomach, Not so with this doc. All i had was alittle bit of discomfort that night on friday then on sunday morning I rode 2hrs about 140miles to indianapolis to watch the moto gp race.
My advice to anyone going to have this done find a better doc than this guy had.