Is ADHD related VACCINATIONS-Does CHELATION help?

My five year old shows signs of ADHD, half-way sits still, doesn't pay attention to teacher, have to call his name several times, distracted by other children, preposely bumps into me, chews clothes, likes sweets, snores, half-way sleeps, misbehaves, hugs, touches others...

He was a calm child until around 18 months when I says he "woke up".

Could MMR shot have caused this?

My two year old has never had a vaccine and doesn't act like this at all.

Can chelation therapy help?

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