I had a vasectomy about 2 1/2 weeks ago. and me and my wife has had PROTECTED almost every day since.?

i go to the docs office tomorow and what i was wondering is do they have you into a cup at the office or at home. i was given nothing to collect my sperm in. i heard they have you do it at the office while looking at a playboy book or some movie and that is just not me because i have more respect for my wife than that. does anyone know the answer to this. or do they have you do this at home..