Default Weird camera issue, does anyone else have this problem?

I have had my N5 for a few months now, and it has been great. However I opened the camera app the other day against a white wall and noticed there were darker circles.
I took a picture of a brand new sheet of printer paper, in the camera app itself it is very noticeable but when you transfer it its not that bad. It does this with all camera apps I have tested. I cleaned my lens but that didn't solve the problem...thinking about RMAing it before the problem potentially gets worse, but wanted to see if its a common problem.

Thank you!
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