WORRIED??

I took the morning after pill about an hour ago and I'm worried as I am only 16 if it is going to hurt my body, the chemist said they don't know much about what happens to 16 year olds who take it, should I be worried? Will something bad happen to me?? I have never taken it before but I've heard some people get brain bleeding and all sorts of things and it's worrying me so much 😞😞