I have a couple pregnancy apps on my phone. One says I'm 6 weeks (I am 6w5d). Another says I'm in week 7.
When I counted backward (from today), I have completed 6w and 5d. So this would mean I am IN my 7th week, though I have not completed it and become "7w" yet.
I've been thinking of it like birthdays - when I turn 24, I'll have completed 24 years. I'll then be IN my 25th year.
How did you think of "weeks" of pregnancy?