Things seem to have changes for the better since my time: How old are you? < 30? I have two kids in grammar school right now & they no longer face this same type of issue, but I also don't know if that's a local change or a more general re-think on students' biological needs.
30 on the dot, but my school was pretty liberal/progressive/what-have-you, so that may have helped. Hopefully considering those needs is more commonplace now, and folks won't have horror stories in the future.