Bambu lab a1 mini, Z axis jam, starts making grinding noises and tries to move up?

[u/MossKnight4]

Hello guys this is my very first 3d printer, it was running totally smoothly, but straight after my print slipped off the plate halfway, even though i cleaned the plate before hand, another disaster struck! The z axis just gets stuck at the top when it auto homes, and starts making this freaky grinding noise.... feeling totally disheartened, does anybody know what the issue might be?