Jack up the car and put it on a stand. Have someone else to look with you.
Before you take off the wheel, grab it at the front and back and try to wiggle it like you are trying to steer with it. Look for movement of the wheel and rotor in relation to caliper.
Look for grease from the wheel bearing on the inside of the hub.
When my wheel bearings went bad they rumbled all the time and the noise varied with road speed. Here the "correct" tools for replacing them.
#1 left to right - nut, 2small washers, 2 large washers, old inner bearing race, the axle nut, 30mm impact socket, washers and nut - on a piece of all thread.
#2 socket and axle nut on hub flange.
#3 Washers and bearing race on inside of new bearing.
The old race will stay on the hub flange after you drive it out from the inside. After you drive in the new bearing using the old one as a drift you set up as in 2 and 3.
PM if you need to do this.
