Just wanted to share-
My aunt is so confused by why we count the weeks now. She says she only knows months and told me how to figure out mine.
Take your due date - mine is May 14 - and count backward from 9 months for each month. April 14 would be 8 months, March 14 would be 7 months, etc.
So now when I talk to an "older" person, I know what to say. Right now I tell them that I'm just about 3 months.