Unusual story, Cut, with a strange ending in current New Yorker

An author new to me and I think new to the New Yorker, Catherine Lacey, has an unusual story in the current edition, Cut, which refers to a severe cut that the narrator identifies as an unexplained laceration in her vaginal/anal area that causes her of course much pain and anxiety. Her desultory efforts to get medical treatment get her nowhere, so she endures the pain and worry over the course of the few weeks or so that the narrative encompasses. Through these weeks we learn that the narrator is a 30-something playwright and professor at a college in the (unnamed) city where she lives; two of her students seek her out in office hours and seem to be deeply disturbed, even suicidal, but she offers no real solace aside from extended deadlines for assignments. We also see her difficult relation w/ her oblivious and callous husband and her friendship w/ a woman twice her age (i.e. ca 70) who offers her bits of cynical wisdom based on her 2 difficult marriages. Lots of anti-male stuff here, and justified, but what makes the story fly is Lacey's quirky humor and many odd turns of phrase, especially in dialog (wondering if she herself is a playwright?) and a few really odd moments: For one, her husband comes home one night with this phase bloody and swollen. He gives her a ridiculous story that he was attacked by a pit bull. She just lets this go by, so what's going on here? My only guess is that the husband is involved in some rough trade and the wife just silently tolerates that - each has his/her own problems and secrets. Second, the ending is truly unusual and daring: the narrator rightly notes that nobody wants to hear a stranger's (or a narrator's) dreams - dreams must be used sparingly if at all in fiction - and then goes on to describe a dream of he bifurcated body - and extreme extension of the eponymous "cut" - make what you will of the choice of that word, by the way - in which one half of her body walks through the world and the other half clings to a wall, tho I may not have this precisely right, but the idea is that she is leading a double life and that the pain of doing so and the psychological cost is unbearable and not sustainable.