Well I’m one of those people who didn’t know I was pregnant so drank a decent amount before 6 weeks, when I found out. And then I inadvertently had a drink at about 10 weeks (ordered a virgin drink and got something with alcohol by mistake). Then nothing until 2nd trimester, at which point I would have a half glass of wine or half a beer occasionally. Maybe a couple times a month? By my third trimester I didn’t feel like drinking to be honest.
Anyway, point is: I wasn’t super careful and my kid has no issues. I’d be more careful than I was (had I known, I would not have had anything 1st trimester), but I am I phased by pregnant women drinking occasionally. And btw, I told my OB about all of this and she waved it off. It’s common for women to drink before they know they are pregnant and most docs are not worried about a drink here and there. And they’ve seen it all.