Even if it is 1 or 2 click, you should still send email to google, this shows your sincerty and you also have proof that you contacted google. thx
When I have done this in the past google just does not pay for the click, if do not do it all the time you will be ok.
dont worry.. but avoid this next time. emailing the support team is better. (adsense-support@google.com)
I have a friend who actually mad an accidental click on his adds since his internet connection was a little bit slow and when the site was loading, it was the adds that was clicked. Well, he informed google about it and got a positive response that accidental clicks usually is understandable for as long as it does not happen often. Obviously, if it happens on several occasions then then it would not be accidental anymore. Google can verify this and then there is a tendency that your account will be banned or suspended. Well, it would also be helpful to contact google as to the time you have accidentally click your adds to show that you are a user of good faith.