Glad you finished your tests, Shadi, and it's good that you got some valuable information from your doctor. I'm from Atlanta, and they're good folks over at Emory, so I'm sure you were in good hands there.
As others here have said, MS pain is very, very real. In fact, I have to take pain pills every night because my neuropathic pain is so severe. It's good that you're going to a rheumatologist to get some help with pain management.
Many of us with MS also have other auto-immune conditions that can produce pain--I have Lupus and, years ago, most of my pain was from Lupus inflammation. Now, most of my pain is neuropathic and caused by the MS.
Your pain may or may not be neuro-related, but you're doing the right thing by seeking treatment and getting answers.
Best of luck to you, and keep us posted!