So I've heard of people having to pee when they are nervous, but my situation's a little different. Every time I have to run a race, or do something in front of people, I feel like I reeeally need to take a crap. When I finish the race, the feeling goes away and I'm fine. Sometimes, before a big track meet, I end up taking a dump like 3 times before I run. This only happens to me when I'm nervous. Is this normal?