I had MS-like symptoms about 2 years ago: weird sensations on my skin, sudden pain spots, random ant-like crawling sensations, etc... they were getting worse but MRI came fine, Spinal Fluid testing came fine, etc...

However, my vitamin D levels were low. I started taking D3 and noticed that some symptoms got worse at first but gradually went away after a few weeks. Now, every time symptoms come back, I take vitamin D and they are gone a few days later.