I was driving around today running a few errands and on my way back home it I kept hearing a popping noise from the passenger side as I would go over bumps. It got progressively worse as I drove on. I was near home so I just slowed down and took it easy. Sounded like loose lug nuts and the wheel would fall off at any moment. It would get louder with each bump. I got home and checked the lugs and they were tight. Jacked up the front end and pulled in and out and up and down and no movement everything was tight. Any ideas?