Something stuck inside of body?

When I use my vacuum, it makes a very loud noise. It sounds like something is getting sucked into the cavity and partially blocking air.I t still sucks, though not as well. When I turn the vacuum off, it sounds like something falls back down. I’ve checked all the hoses and the holding compartment, but I found no blockage. I removed the body from the head and took the bottom off, but I can’t see any place where there could be something stuck - BUT if I turn the vacuum on, it sounds like it’s in that section that something is moving. Any ideas?

Thanks!