Great job hun xx

She looks down at the waves,
To her watery grave,
And her heart begins failing to thump.

^I like those lines, especially the third one. The way everything tied together was nice.
I like that you were able to pull a whole story out of just one event.

Your flow was a little off, but it didn't matter too much.
I also liked your rhyme scheme. While it was a little hard to detect at first, I finally got it.

You need a comma in the line, "Nothing can stop her she's made up her mind," in between her and she's. Unless you're going for a rushed feel, I'd recommend punctuation.

All in all, I liked it. 4/5 for minor flow and rhyme issues.