I was told by a chiropractor that the liquid cracking noise is inflammation

More than likely it's something called crepitus. It's a descriptive word that is used when the joints make that crackling, sometimes it's like a grinding of fine sand sound. Happens in the cervical vertebrae and can sound as if it's coming from your brain. Of course, check with your doctor.

Not sure about the water sound - maybe the tinnitis.

It’s your over active nerves when I told my doc he thought I was joking until others said same and no it not my joints LOL 😂

It does also feel like there might be liquid there

Yes i get snap crackling popping in back of my neck, have osteo arthritis there but it may well be both that and the fibro that causes it - if i press on the area it crunches and pops