I'm getting a bit worried...

I go into my AS stats and see 5 clicks, from 28 page impressions.
Yestarday - 4 clicks and 61 page impressions.
two days ago - 3 clicks and 11 page impressions, all in the same channels.

Is is possible that someone enters my site every day and clicks?
If so - who to contact?

(most of my traffic is from google)

 

you're being a bit too paranoid. Don't think anything of it and let it go. just keep developing your site.

 

5 clicks from 28 impressions is very high! You should install a program that tracks adsense clicks and see if they are from the same IP. Look through the threads of this forum because I saw some people recommending a few...didn't remeber any names, though.

 

Could it be that your website does not contain any interesting info and visitors are tempting to click on the ads to leave your website??
Post the URL so we can see.

 

I see nothing wrong with this. Continue developing your site as usual.

 

If your that worried about it, you can contact Google Adsense at the below URL and report possible invalid clicks. Personally, if the earnings are registering then they aren't invalid. It's your call.

https://www.google.com/adsense/support/bin/request.py

 

Thank you!
My site is a quality content and very targeted, so I guess it is real clicks...(;