Where do I start looking if ant-freeze is pouring out of my car?

What is your question?

I was driving,felt like my car ran out of gas ..but it didnt..I stepped out the car and anti freeze was pouring out the bottom of my car...now it wont start and i have a pool of anti freeze under my car..I dont know what happened or to begin to know where to look cause everything is wet..why would it start pouring anti freeze out of the blue like this? what do i do?