I was diagnosed several years ago with having what the doctor said was arthritis in my knees and my feet and my fingers and an MRI shows degenerative arthritis in my neck. What is the difference between regular arthritis and rheumatoid arthritis?

What other symptoms can rheumatoid arthritis bring on? I've had some crazy symptoms over the last 2 years and I mean it's a multitude of wide range of symptoms that are debilitating but the doctors have done every test known to mankind and everything comes back normal so I was wondering if maybe my arthritis which they classify as an auto immune system disease could actually be giving me some of these other symptoms I have