You have a leak or one of your struts are going out. Best case scenario there is a flake of dirt in the ABC lines and the system needs to be flushed. This is urgent and needs to be address immediately. Do not drive the car.
Holy Moly, was it hit? Sounds like your shocks are missing. Anyway, call a tow truck immediately. Very sorry to hear this! Hopefully, this isn't someones idea of a joke. I wish you the best of luck in this. Goodluck