Ladies, do you consider this when deciding what to wear to work/school?

That's how I feel sometimes! I wore a nice black polo today, it's for a girl and I wear it with ons undone and it's a longer shirt and snug fitting (I don't wear the ons slutty though lol) but I was wondering whether I should wear it or not because my co-worker, all he wears is basic coloured polos! How odd would that be if we were the same looking shirt to work, lol! Has this ever happened, do you worry about this?