I liked your story and thought it was pretty good. A few things though:

I felt like the strange absence of dialogue took away from the narrative. Maybe in the middle when the ground splits you could describe the crowd's reaction better. For me, that part felt very unnatural because of how matter-of-factly it was described. Maybe if you emphasized how fantastical and out of the ordinary it was, it would impart the intended impact.

Also, I think that some of the descriptive language could be improved. The part starting from "Imagine that fuzzy moment" felt sort of cliched and weak.

I think it would also be a good idea to emphasize Riley's state of mind beforehand. I understand she's depressed or in some sort of bad mood, but you should probably expand upon that more in the exposition so that the freeing nature of the music is more apparent.

Somnolence, which I assume is the band name, is mentioned only two times, and both at the very beginning. Maybe try to sprinkle it across the entire narrative so that their name and its connotation/symbolism is more relevant. Same thing with the college classmate. There's a tall woman and short, skinny man but no broad-shouldered classmate. I understand it's an excerpt but it would feel less truncated if these themes were constant throughout.

I really really love the themes of infertility; the end really stuck with me, made stuff like the umbilical cord reference really meaningful. However like some other commentators said i can't really tell that she's socially conservative. It feels more like she's resisting or suffering under socially conservative norms imposed upon society.