If another Human didn't enter the battlefield before your beginning of combat step, Éowyn, Shieldmaiden's ability won't trigger. You won't draw a card even if you control six or more Humans.
First strike
At the beginning of combat on your turn, if another Human entered the battlefield under your control this turn, create two 2/2 red Human Knight creature tokens with trample and haste. Then if you control six or more Humans, draw a card.
