Ok - another question

! When someone asks you how far along you are what do you say? My dh thinks it is silly to refer to weeks because unless you are pregnant or have been pregnant that just doesn't make sense, but I am having trouble figuring out what month I am in, it shouldn't be that hard but with the whole 10 month/9 month thing I am really thrown off!!! I've just been saying 16 weeks and will probably still do that but I try to think back to 17 weeks ago and weeks didn't mean much to me then either - I always wanted to know months!!!