anxiety...

my kid has anxiety. anxiety to new situations, to new kids, to too many kids, to anything new. i did what any mother would do these days - go on amazon and buy a bunch of books. what else can i do? i want to make him a well adjusted child but he is just uncomfortable in his own skin. whrn he isn't feeling anxious he is a great little boy. he is so sweet. today he woke up late at preschool and freaked out - could not be calmed down. nap time usually ends and then it's time for a snack - he woke up during the snack. all hell broke loose. his teachers are worried about kindergarten. so am i. how is he going to cope when he cannot participate in gymnastics with 6 kids when kindergarten has 22!