Are you worried about GCSEs and what are your predicted grades?

Teachers should never predict A*s. All it does is set you up for disappointment if you don't achieve it. Don't worry about it. I got predicted all As when I did mine and I was worried. Overall the exams were quite easy (this was last year) and I came out with all As and higher. Your teachers know you are capable of it so just try your best and you'll be fine.