My Baby is all grown up!

My baby started kindergarten yesterday and I have to say it left me feeling sick to my stomach- my baby is getting too big! She kept telling me all morning that I was going to make her late. She didn't want me to take a shower because she thought we would be late. Then she pushed me away and told me to leave once we got there. Right before I left she did ask me not to forget to pick her up and she said I couldn't talk too much to anyone when I came to get her because it would be too embarrassing! Since when does a five year old get embarrassed by their mother. Aren't they suppose to love us until pre-teen age? Along with kindergarten she starts AYSO soccer with Chad as her coach this week. He tried to have a practice tonight and of course she wouldn't listen to him at all and didn't want to share her soccer ball with the other girls. I have no idea how to make her share- we force her but it doesn't seem to help. Any ideas how to break my daughter of her selfish ways would be great!