Is there anyway I can focus more?

So everytime I go to a show when i get in the ring I just can't seem to focus, and i'll have perfect courses with one mistake that kicks me out of the ribbons, I know everything isn't about winning but I would just like to be able to focus and have good rounds. I also pressure myself really hard into winning and i jsut mess up :/ I'm sorry if i sound bratty :/ any tipss?