:protest: 1967 Plymouth Valiant Brake Problems HELP

HELLO, Everyone who reads this. I need HELP my 67 Valiant has 26000 miles all original
nothing missing but things are acting funny such as my brakes. I drive my Valiant to work 3-5 times a year. today i parked it and put my brake club lock and it pulled the towards me so i removed it and put the pedal back down and the brakes still work, then I turned off the car and the brakes lights are on but i didn't apply pressure on my brakes, I'm scared that the sensor or anything mechanical got broken. Ive had the car for a almost a year I'm the 3rd owner and i bought new front and rear brakes and still need to put wheel bearings but thats another thing later i just need help on my situation for my brakes PLEASE HELP ME WITH ANY INFO. THANK YOU.