Every time I’ve gone to the doctor in the US since several years before I actually had my first period (I was a late bloomer), I’ve been asked about the date of my last period. Since I moved to Germany (a country with a longer life expectancy than the US), I’ve only been asked if I could be pregnant before X-rays and prescriptions or when it’s been relevant to my visit (abdominal cramps, unexplained vomiting, etc.). I understand if you didn’t realize that it’s asked for absolutely everything or if you thought it was actually necessary, but it’s both constant and unnecessary.