You turned a little spill into a scene from "Carrie." He was nice about it, it sounds like he would have been happy to keep going and he continued to text you. But you? You freaked out, stopped responding to him and have probably been acting all weird at the office.
When modern contraceptives first got formulated, back in the 1950s, the men in charge made a simple assumption that would affect millions of women over the next half century: They assumed that women wanted to bleed every month.
Puberty typically isn't a favorite memory for any of us. During that angst-ridden ride between childhood and adulthood, nearly everyone's best goal is simply to fit in. That's even tougher when you're only in second grade.