You are sooooo not alone.
I'll have to try and measure with a bra on next time. I'm afraid my measurement may go up. Although that might not be a bad thing since I've gone from a "D' to a "B" already. I'm afraid I may not have anything left by the time I get to goal.

I just find the the biggest "stuff" sticking out and measure across that. I can't wait until the measurements are not a big deal any more.