I am so sorry to read you suffering a great deal, but hopefully new year brings you less pain and happier life!
I have big 3: MS, Lupus and RA, not to mention disabled due to Arachnoidites inherited from 2 failed spinal fusions.
As far as I see, your blood work is fine. I am not a doctor though. Usually when you check your blood work, you can see where lab writes either HIGH or LOW or REPEAT ASAP in red letters. When this happens, you know that something is not normal.
Did you have brain MRI and spinal tab done for MS? Usually these 2 are the most accurate tests and if you do have MS, it shows either on brain lesions or spinal tab test.
Lupus shows in your blood work; also Lupus shows in tiny little red "stars" on the bridge of your nose and inside palms of your hands. But not everyone with Lupus has them, but blood test shows it all.
With RA is more complicated since even with perfect blood work, but based on serious symptoms and evaluations, patient still may have RA.
For example, I have enlarged nodules and fluid on my lungs. They checked me for cancer, I had to have CT scan every 6 month. And guess what? This all is due to far gone RA. Ruptured ligaments, teared muscles, "eaten" cartridge, tons of inflammation and damaged joints - I was diagnosed with Fibromyologa, OA, Lyme, but not RA for years!
What I am trying to tell you sweet heart, make sure your Dr is very knowledgeable, very carrying and wants to help YOU, not the number. I went through so many RA and finally my wonderful PM DR, who presumed I do have more than spinal damages, sends me to this RA dr at Hospital for Special surgery in NYC. I was diagnosed with RA, at my first 2 hour app with her. She had tears in her eyes when I told her what I am going through and how I still dont know what is going on.
She was so sure of the diagnoses that she puts me on treatment right same day before any blood work. She didn't have any doubts.
Best of luck to you to have all your questions answered. Search, do your homework and see as many opinions as needed. Dont waist your time if you feel something is wrong.