Handling nerves

I tend to hype myself up too much for a match and then I end up getting so nervous of letting the team down that I usually end up making a crucial mistake. Tomorrow the womens team I joined have our first match….against the womens team from the club I played for, for 7 years. I really want to perform well because I not only want to prove a point to my old club but also I don’t want my new club to think that I’m not 100% commited to them.

Any tips would be greatly appreciated!!!!