iphone 5 update from 9.0.1 to 9.0.2 power button not working anymore

Hey,

I've just updated my iphone 5 from 9.0.1 to 9.0.2 and from then on my power button on the top stopped working. I'm unable to activate lock screen or shut up the phone with the button. Only assistive touch can put it in lock or shut it down, but then I have to connect it with my macbook to turn it on again. I'm super frustrated with the 9.0 Update, feel like I'm back in my microsoft windows days!