Yes, I would say you are experiencing many MS symptoms replete with the ever "popular" MS Hug. You can very well have both fibro and MS. Lyme tests often have a false positive; therefore, a second test may be needed. Hopefully your MRI will get you some needed answers.
For me, I had to give up work, but there are others who can continue a career with lateral shifts/transfers or workplace accommodations. I hope you can find something that works for you. I do not know the disability procedures or workplace accommodation rules in Canada. I certainly hope you get answers and RELIEF soon!!