Iphone 4s- stuck in apple logo, loading bar don't load
So my phone still had 37% battery when it died. Charged it and it wouldn't charge or even open up. Plugged it in my computer and Itunes recognized it. I had to do restore mode, apple logo came out but the loading bar under it doesn't load up, so I'm stuck right there. Itunes says "Waiting for Iphone".
What should I do when the loading bar doesn't load up? Help please. Thanks.