You may want to try to practice on some smaller descents. Although I have always loved the fast descents, I actually had a class in descending from Carmichael Training that taught me a technique that is safer and repeatable. One thing I learned is that if I have better access and light control of the brakes when I am in the drops. I can lightly feather my brakes while descending so that I don't slow down to a crawl, but also I can have better control of the descent. Sitting back on the seat, relaxing upper body and feet firmly planted (definitely both feet clipped in!).
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"I never made "Who's Who"- but sure as hell I made "What's That??..."