I have a distinctly different memory--about the same age as you and recall my 6th or 7th grade (so late 60s or by 1970) social science teacher telling us that we were baby boomers. Only on letsrun, in this thread, have I seen denial and pushback on the post-war mid-40s to early 60s as the baby boomer birth era. Weird people here.
And this site shows the curve:
https://knoema.com/atlas/United-States-of-America/topics/Demographics/Fertility/Number-of-births