How to get rid of this pink in my photo?

I just bought a new camera, nikon d3100
I'm learning how it works but i've tried and tried again to figure out why my camera is taking all this photos with pink in them. I just took a picture not long ago of a body of water and the sky (overcast) reflection turns out pink instead of the gray color it should be.
I have put the photo i took as my profile photo if anyone could take a look and give me some advice on what i'm doing wrong. Thank you.

Added (1). Photo is now on Flickr aswell

Added (2).

Lightroom or photoshop

Interesting.
Most DSLRs have a "highlight warning" mode, that shows on your camera's display colored or blinking areas where the image was overexposed, over-saturating the pixels. However, that mode is only supposed to affect the images ON YOUR CAMERA'S DISPLAY, not in the image files themselves. The images should just show blown-out white highlights.

I've seen something like this before when an image editor didn't have it's file reading software done correctly, and was interpreting some data in blown-out areas as "wrap-around" numbers… So I have to ask, were these JPG images or RAW? What software have you used to process them? It could be a problem with your editing/RAW software.

The only other possibility I can think of is that the anti-blooming in your camera (the hardware gates on the sensor chip that "bleed off" charge from over-exposed pixels) isn't working properly, and is screwing up your images. If you bought this camera used, and can't nail down a software problem, return it. If you bought it new, contact Nikon and get an RMA for warranty repair.

You can use a filter when you taking photos

Nikon stopped making the D3100 at the end of 2011, so the camera you bought - assuming it's not refurbished - has been sitting on a warehouse shelf somewhere for a long time. So there's a possibility it is faulty.

If not -- try this: The pink indicates places in your image where there's no data because of overexposure. When you see the images on the camera screen, I'm betting the word "highlights" is shown in the lower left corner. Simply use your control/toggle wheel to click up or down, and they will go away. This is one of several options for viewing images after they're captured.

In other words, your exposure needs to be corrected.

You could post it in flickr - it would be so much easier to see what you are talking about. It is so small the pink things could be flowers. I really can't tell. Post a full size jpg.

Get out the manual, figure out how to return the camera to factory settings. Set the exposure to Auto (yes, really, for this one thing.) Go out in sunlight and take another photo. If the problem persists you may have a camera issue. If it doesn't then you have something set wrong. My gut feeling is it is in how you set something on the camera, but you have to test to eliminate the possibilities.

Edit: Figure out how to turn the gamma warning off. The pink spots are only in white areas which are very overexposed - the camera can't render that range of light. Consult the manual - I don't have Nikons so I can't advise you more specifically. I downloaded the manual and can't find it. This is a control setting issue - somewhere you have to be able to turn this off. Let me email this? To a friend who uses Nikons.

Edit #2: Some good answers there - especially Paul's. Do you see this on the camera playback or is only on downloaded copies? If it is on both, then probably a pixel issue, send it to Nikon or return it. If it is only on the copies, then it is the software. Reinstall your software and try again.