How do I stop being so nervous?

Hey guys, this is my first post. I just found this site, so I hope this works. I’m not sure if I’m doing this right…. =\

I get way too nervous before I perform at things, especially card tricks. I love doing card tricks, but I get way too nervous and I start shaking and that’s not good for card tricks. :( People notice and then make fun of me for it. I don’t know how to not be so nervous, even if I know how to do the trick well!!

One time I had to give a speech and I got so nervous before it that I thought I was going to faint. My heart was really pounding. How do I stop this?!! I really hate it!! >.<