I was on the swim team in middle school. I conquered my car sickness reading books like Karleen Koen's Through a Glass Darkly on the half hour drive from the east side of Providence, where I lived, to practice in Barrington. That was about all I accomplished.
There is a stupid stigma around mental health stuff, and nobody talks about it (which is partly why I try and talk about it with everyone and anyone I know, like, all the time). Having anxiety or depression is nothing to be ashamed of.