Has anyone ever heard of aspartame toxicity?

aspartame is an ingredient found in lots of sugar free sodas, candy, powdered drink mixes. it can mimick symptoms of other diseases like MS or lupus, parkinson's. im having some dizziness, weakness in my limbs, headaches, anxiety attacks, palpitations, and about 19 other ociated symptoms. i mentioned this to my doctor and he pretty much just blew me off. has anyone else experienced any of the 63 ociated symptoms? if you dont believe me, look up "the dangers of aspartame" and there is a whole list of stuff.