Hey there!
Congrats on writing your first complete piece. I think you depict what you're trying to convey pretty well, I definitely got a sense of despair and anguish while listening. It can be no easy feat when trying to adhere to a form, and you succeeded in that.
I agree with the comment above, I think starting with a pickup note would help this tremendously. Your overall phrasing of the violin melody is sort of begging for it, and it can seem a bit odd with the way it's written.
Also, doubling the melody in the piano is a great way to make it stronger, but maybe try adding some harmony in spots. If this were my piece, I'd have them doubled like you have them, but maybe the second time around give us a bit of harmony.
I quickly drafted up the first phrase with some amendments, here's what I'm talking about. Great job overall, keep the pieces coming and keep writing! This site is a great source of information and helpful people that generally don't mind throwing in their opinions about your music.