Wheel bearings usually make more of a howling sound that will change with wheel speed. One way to tell which side it's coming from; drive at a steady speed (20-30 mph) with the noise happening and do wide sweeping turns left and right and listen for a change in pitch and speed in the noise. If the noise is louder/faster when sweeping right, the left bearing is suspect and vice versa. These bearings require special tools to press the bearing out of the spindle and are probably best left to a professional with the proper skills and tools. However, your "squeak" doesn't sound like a bearing, at least how you describe it. It may be best to get it checked out to save yourself from replacing parts that aren't needed.