I wouldn't take anyone's advice on MRI reading here too seriously, a far as I'm aware there isn't anyone who is actually qualified to read them on this forum. You may as well go into a fishmongers and ask them! That's not to say that people on this board can't help you. From my own, albeit small, knowledge of how the brain works, if you have a range of different symptoms affecting totally different parts of the body, then it's unlikely to be a tumor, it's more likely to be multi-focal, like MS, where you can have lesions spread all over, effecting different physiological systems. You are the first person i have met who has one of my symptoms: tingling on skin in direct sunlight. I haven't been diagnosed with MS yet, as my symptoms are very mild, and I have not yet had a major flare-up.
Also, your symptoms would be very unusual for a brain tumor, it usually presents with two common symptoms: headaches and vomiting (mostly in the morning) amongst other things.
Of course it could be that you have nothing, stress can cause ms like symptoms, B12-deficiency can cause similar effects, Lupus, lyme disease, and many other things.