Default Constant Reboot 4.4.2

So my phone was constantly rebooting for about an hour until i removed the SD Card after a hard reboot (Power + Volume Up). A normal Hard Reset did nothing. This has happened several times before, but the problem went away, this time I had to remove the SD Card apparently. I use Apex for my homescreen if that helps at all. I don't use a custom ROM, everything is stock.

Sometimes when it reboots it will instantly go to the DROID boot animation, sometimes no audio would play and it would lag at first for a second, then suddenly it will play the animation at lightning fast speeds.

Another issue is at first, for about a minute or so, I CANNOT lock the screen. I can hold the power button down to get to the power off menu, but not lock it.

Again, The problem has stopped, but it WILL return. I was wondering if anyone can help solve this?

P.S. I'm on Verizon