Serious brake problems, pedal stiff and front brakes seem stuck?

So this has been happening for about 3 weeks. At first it would be rare but now has progressed into a problem that will happen upon minutes of driving. I noticed it after i hit a hole in a road and ever since then my brakes have never really been the same.

In detail my problem is this: after roughly 15-20 minutes of normal driving my front brakes seem to stick, like the piston is not retracting back in to the caliper fully due to some sort of pressure keeping it out pressing against the rotors. This is happening on both front brakes, not the rear I know this because my rear brakes are so shot that my e-brake barely holds my car when fully applied. Also the front rims are very warm to the touch, while the back are cold. The brake pedal is also very firm. Also another event that has only happened once is after driving my car for a little while, the brakes were acting up las said above. So I parked my car and let it sit for roughly an hour to an hour and a half, I drove it after giving it a break and my pedal went all the way to the floor before my car would even start to stop.

These problems have come up under normal driving. I am not sure what is going wrong here all I know is it doesn't seem good. Any advice or insight to what might be happening here would be greatly appreciated.

Thanks.

Start by putting the car on jack stands, remove splash shield, wheels and inspect for visible damage.