My son is 5 years old and has just started year 1 at school. He’s always struggled with new environments and activities. At school drop off he doesn’t go off playing with his friends while we wait for school to open and won’t say hello when other kids greet him. He’s been doing swimming lessons for about 14 months now. Every week it’s a struggle to get him in the pool and I know he can swim a lot better than what he shows his teacher during his lessons. Younger kids are starting to overtake him. Should I be worried or is this normal behaviour?