It's cause the don't teach you anything besides the " you get your period. When you stop having it you're pregnant !! "
That was literally all we were taught.
No, they freaked is out in sex Ed they were basically like "if your period is even three seconds late, you're pregnant, even if you've never even looked at a boy, you're pregnant"
When I first started my period, I used a public toilet and it was late by a few weeks(my flow was starting to get a set schedule) and I got worried I was pregnant
That was literally all we were taught.