After braking hard in traffic, no acceleration?

So, in traffic we all came to a sudden stop where I had to press on my brakes hard. The traffic started moving right after, however when pressing the gas pedal, the vehicle would not move, but I did hear the engine rev. I started to freak out because traffic was moving, and I couldn’t move. I had to put the vehicle in park and then to drive. No engine light came on and went about my day. I’ve had new brakes and rotors done about 3 months ago. I’ve also noticed that if I drive over a speed bump, and I don’t go super, super slow, the same thing happens, I brake to almost a stop, go over, and the tires land and the vehicle on its own proceeds to move forward... I press on gas pedal to get the other two tires moving over the speed bump, I get the same thing, shift to park then drive. Any ideas on what it could be? Thanks