jack up your car until the wheel is completely off the ground
and wriggle it in and out (top and bottom using the centre as a fulcrum)
ie- one hand on the top of the wheel, the other on the bottom and push with one hand, pull with the other, if the wheel moves or makes a knocking noise, you're bearing is stuffed.
do the same although for left and right of the wheel rather top and bottom.
if there is any play with the wheel, check all your suspension bolts and then start saving for new wheel bearings.