This will seem like a long shot to you but you might find it useful to identify any micronutrient deficiencies/imbalances. Can you have your b12 (numbness, tingling), magnesium (spasticity, cramping, vitamin d metabolism), zinc/copper (immune and sensory issues, strange feeling head for me too but never described elsewhere), and vitamin d (it's all the rage these days...lol) levels tested? I know I'm forgetting a couple but that's a good start. For more explanation as to why those levels might be important and a more complete list of what to test, check Jimmylegs' thread in the regimens board. It's loaded with good info that is applicable to far more than just multiple sclerosis.
I hope you find answers soon. You've come to a great place for help.