Help??

I hope I don't sound stupid as this is my first child and I'm also a teen mom who is still learning. My son will be two in August, and he will throw the biggest fits and just cry his little heart out when we're in very crowded and public places (if it's not crowded he's usually fine) is it possible that he gets anxiety from being around large groups of people? Also, when I remove him from the situation, like take him to our car and sit with him until my mother gets done shopping he's fine.