I picked up that piece a few years ago...golly, it's already 10 years
when I "needed" a piece to play as a sort of a 'prelude' to the Op. 49 Fantaisie, for the 1st round of an amateur competition. ("Needed" is in quotes because it turns out I didn't really; another person also played the Fantaisie, without anything else. Although of course she didn't make the next round and I did.)
I searched through all (ALL!) of Chopin's real short pieces (had to be 2½ minutes or less), and decided that this mazurka, above absolutely all the others, was the best piece to couple with the Fantaisie, for a 15-minute program. And I think it is.
So, about your performance. First of all, you 'have the notes,' and you basically have the piece, which is darn good for just 1 day.
But, although it's not like you aren't putting "expression" into the piece, it seems to me like you haven't much thought about what the piece is
-- what it's saying, what feeling(s) it's conveying.
I didn't really get any feeling of a "feeling" until the return of the opening theme. Before that, it sounded to me like you were basically just 'playing the notes,' occasionally doing a thingee or two that seemed like "a good thing to do" in a Chopin mazurka, kind of like how a chess player who is at a loss might make moves that in themselves follow good principles of chess playing but don't necessarily fit in with any larger plan. (BTW in chess that's usually not too bad! But in music, probably not so much.)
Like.....That opening is FULL OF "feeling." We could even say it's nothing but feeling. It's full of little figures and gestures that are utterances of a most poignant nature. Chopin is trying to "say something," perhaps sort of literally; isn't it almost as though these are verbal
phrases, with unspoken/unknown WORDS? My goodness, these are utterances.
And then, when the second theme comes in -- and in the major.....what a DIFFERENT feeling that is. It's a world of a different collar. (Apologies to horses.)
But, I'm not hearing any different feeling or different world there. Are you? I don't think you're feeling or recognizing each section for what kind of thing it's saying, or that you're moving from one brief world suddenly to a very different kind of one (and back again).
Aren't you glad you asked....
I hope this is interesting and useful for you.