New Sports Commitment!

[panicfree]

Hello everyone! Recently I have decided to join the swim team at my high school, which is a huge commitment! I know that I am a very skilled swimmer and I have confidence in myself that I will do good, but it's so much work! I'm not afraid of work because I take AP and Honors classes, but I am a little afraid that it will be too much for me to handle and I wont have enough time in the day to get things done. I have discussed it with my mom and dad and they both said they thought I could handle it, and if it gets to be too much I would have to stop it.
Swimming has always been my passion, but about a year ago I had a terrible anxiety attack in the pool and have been afraid of "working out" too hard because I fear that the hard workout caused it! I have worked out hard since then, but the fear is still somewhat there. I know now that it most likely didn't, but the thought still crosses my mind. Before I get in the pool I feel like I have to eat a lot of food because I told myself I felt like that because I didn't eat enough before I practiced! Has anyone else had a situation like this before??
I know how to manage my time but I don't want to get run down. We have practice Monday and Friday from 5:30 to 6:45 and practice every day after school. It's going to be a lot but I think it will be a great experience. After all, I'll be in great shape!
Has anyone ever taken on a commitment like this one and been a little anxious for it??
P.S. This may sound crazy and weird to anyone who has not experienced these feelings while exercising... but for those of who that have, you know that I'm not crazy!