How bad did I just fuck up?

So I like this girl and she likes me, and she was singing both days at a two day concert. I made it to the first day late because work held me up. I saw her sing and she was awesome and I got to talk to her and told her I'd be there the next day too to cheer her on. Well the event looked like it said the second day started at a different time, so long story short I arrived on the second day at the time the second day ended—not started.
She said it's cool, but I don't know. I think I done goofed.
How bad did I just fuck up?
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