my son is going to turn 1 year on sept 3. He has being started walking around 20 days back. He tries to walk at a fast pace n does not like to sit any more. But from couple of days he is shaking while walking and fall down after 2 or 3 steps unlike before. This is making me worried about his leg muscle development. I massage him mostly daily and moreover he is on teething. plz guide how to make his walk correct