From the sound of the description, there is nothing to worry about. There often are spots on MRI that don't correspond to anything. They have been jokingly called UBO's (Unidentified Bright Objects). Besides, the area of the brain does not correspond to your symptoms (double vision).
As far as your symptoms, how long have you had them? Do you have diabetes? Has he done a spinal tap?
I am glad the MRI was normal. This doesn't sound like seizures to me. I agree, with your age and symptoms, MS needs to be evaluated for. You probably need a spinal tap and nerve conduction testing. Other than MS, this could be nutritional deficiency (B12, Folate), or some sort of chemical toxicity.