I would reset your heatsink right away! Definitely stop running the pc ASAP. I'm surprised that your cpu hasn't throttled or hasn't just turned the system off due to high temperatures. So what i would do if i were you, remove the hyper 212 + you have installed, clean the residual thermal compound from the heatsink and from the cpu itself. (http://www.newegg.com/Product/Product.aspx?Item=N82E16835100010)
then reapply with the thermal compound that came with the heatsink. Or you could go with arctic silvers compound aswell (http://www.newegg.com/Product/Product.aspx?Item=N82E16835100007)
two great products that i have used. For cleaning i use coffee filters for wiping off the old compound, and spreading out the new compound. I know this post is on the longer side, but i wanted to be as explanatory as possible. Please after trying something like this, let us know the results!