2013 extened cab leaking somewhere on drivers side in front and back bottom corners
 

I have a 2013 Silverado extended cab with rain leaking in the drivers side somehow and I cant find the leak. It's been getting wet it seems in the corners at both ends of the doors. The carpet is sometimes wet halfway under the floor mats and makes a squishy sound when pushed down on. I've looked around the door seals and cant find a leak. Anyone else ever have this trouble? if so how do you fix it? Any help would be appreciated.