I got a lot of clicks on my site today and I wanted to make sure it was not the same person clicking multiple times since that might upset google. Is there a way to figure out if it was a single person or multiple people?
There is nothing that you, personally, can do to find out who is clicking your ads. You can contact adsense support just to be safe though.
Your stats should show exit links which would tell you. If you don't have stats you can use Statcounter as DoDo Me mentioned that will show them.