I don't know what it could be, but sometimes when I start going I hear a slight squeeking from one of my wheels, and there is a time gap inbetween squeeks, so it's like it's just at one part of the wheel, and I don't know what it is. I'm assuming it's nothing to be concerned with, but I just wanted to be sure. What do you think it could be?

i would say it's not your wheel, but your brakes are almost shot. just replace the pads and it should stop. hope this helps
adam