On the way home from work, I went to disengage the park brake on my truck! It kind of stuck, the foot assembly came back when I pulled the lever but the light stayed on? I pulled it a few more times & the light finally went off. Later on, I could smell something was burning brakes, park brake? My brakes became sort of stiff when I got closer to home, still had a strong burning smell. Finally got home & the smell was awful! Park brake works fine, as it is parked on an incline. So my brakes were burning up. I checked the reservoir, it is full. Is my booster going out? Does anyone have any ideas? Thank you!