How Does Anyone Keep Up With Anything?

My son is 6 months and I STILL have to look at his little card when asked how much he weighed and how tall he was at birth. I absolutely cannot seem to keep up with that stuff... even now, I have no idea how much he weighs or anything unless I look where the doctor wrote it down for me. I must have a horrible memory or something. I'm not a bad mom... the doctor has always commented that he's healthy... I just can't keep up.. and like people remembering what all foods they've already let their baby try... gosh. I can't. I just live moment to moment lol if I wrote everything down I'd never have any time for him! It was SO different with my first, my, I could remember EVERYTHING, every little thing... but not this time lol

I feel bad sometimes like a bad mom because other women know off the top of their head all these things, when asked his birthday I have to stop and think for a second. I definitely have memory problems. It sucks.