Dirty Flash the stock rooted 4.4.4 rom found in the development section via twrp. This should fix it and from the next time, ask questions in the QnA section
Ok, my bad for the section where i posted this. But could u explain, how do i get to the the development section?
What do you mean by that? Here's the forum: http://xdaforums.com/google-nexus-5/development
Anyways, here's the stock rom's flashable zip which I had mentioned ealier: http://xdaforums.com/google-nexus-5/development/rom-stock-4-4-3-ktu84m-odex-deodex-t2771010