Kind of sounds like the opening to a romantic movie. Chair falls on woman, man says sorry, woman says its OK, que love scene with background music and slow motion frame. Just kidding, but I'm trying to show you that its really not a big deal and if she is normal, then she doesn't hate you or think negatively about you at all. If she was busy she probably forgot about it shortly after, or she at the very most she might have felt bad for you for dropping it but not because she's mad, but because she knows it was a genuine accident that no one could have foreseen or changed.
Oops I totally just assumed you were a guy this whole time, I don't know why, sorry if you aren't! Lol