Accidentally saw baby's gender 😔

Went for my first u/s ever (never had one with other two kids) and told the tech that I did NOT want to know gender or see it. Well, she was NOT careful and I saw right away and then I saw 6 or 7 different times. 😳 She wouldn't stop on the gender area, but I could see clear enough. I work in prenatal health care so I'm wondering if my eyes are attuned to this sort of thing or if this is common if you have an u/s and you can always see so many times? I don't know, I just expected her to be considerate and tell me to look away or whatever. 😕