Now I get it. I thought she was repeating yesterday's events, but no, she's time-traveling to different times. Will didn't recognize her last time because it was before he met her four months ago. In this chapter, she keeps traveling to the time she first meets Will at the café and makes multiple attempts. (It was fun exchanging emails with her boss about requesting a half-day off - this seemed like her inevitable action to meet Will at the café, but I think this led to her getting fired. Anyway, meeting Will seemed most important to her.)