Ok the other day I had bambie stop in front of me and didnt want to do my 05 front end conversion just yet, so I slammed on the brakes. Now when I'm driving the brake pedal will feel stiff barely pushing on it, get soft, and then stiff again and to stop I have to stand on the brakes. Obviously this isnt too safe and I have a roadtrip to austin coming up and would like to get there safely. What could slamming on the brakes have damaged? The fluid is full. Also last night the back right brake locked up enough to stop the truck all together. Let it sit for 15min and then it was fine. Any ideas?