Problem taking pictures with Nikon D3100?

Hi, so I recently started having problems taking pictures with my nikon d3100. Every time I take a picture, areas of the picture come out pink. This also happens when am looking to take the picture through the screen, so it shows pink even before taking the picture. I reset all settings, re-updated the firmware, and still get the problem. This happens even when I take pictures in full auto mode, it seems to happen in every mode I choose. The thing is that this never happened before so I am just wondering why it is happening now.
My suspicion is that it may have to do with exposure because the areas that come out pink are usually the brightness in the room( I don't know why they would show as pink though). I took some pictures inside a room, the walls in the room are white and only some areas appear as pink, so am not too sure if it does indeed have to do with the exposure. When I used flash, it comes out almost all pink, this doesn't make much sense since the room is too brightly lit. I have tried changing settings, resetting them, used different sd card. I don't know if it may just be an option within the settings that am missing.
Please someone help me.
I attached a picture here and also have a zip folder with some pictures taken( jpeg, raw) if anyone wants to go deeper and look at the settings I used. Http://nikonproblem.weebly.com/
Thanks. Added (1). It looks like no one is going to answer my question, but I was able to fix the problem. What I did was to focus on an area that appeared pink so that everything was pink in the lcd screen. I took a picture of it and the pink went away, can't remember if I used flash or not, I don't think I did. I don't know if this is the way to fix it, but it worked for me and will try again the next time this happens.

Read more: Problem taking pictures with Nikon D3100?