...so is that normal? I am not worrying about growing up and having responsibilities. I just suffering from worrying and anxiousness so is this normal at my age. I also mentioned I am 13. I don't know if I am a kid. I still play with my barbies and I feek little but not all the time. Is it just because I have anxiety and it's my age I'm at?

Everything changes when you're a teenager. I'm 21 and I have the same problem - feeling WAY younger than I am. like....I still need to be tucked in a night for example.
But on the bright side - you are yourself and you shouldn't let this bother you, a lot of people think it's very cute

Anxiety will pass in time , their is nothing wrong with playing with barbies at your age. You have an imagination and the need to express it. Plus if it's something you enjoy doing , I wouldn't worry what other people have to say. When you grow up alot of things will play in factor on how much responsibility you have. You may feel better be able to talk or express you anxiety in creative ways . Maybe writing a children book that helps you explore and look at why your feeling anxiety ridden.