The video discusses what happened.
Basically, she had an IUD replaced, and because the new IUD caused a surge in hormones until it stabilized, she was feeling depressed, and talked to a doctor about it.
Unfortunately, she didn’t think to tell the doctor she was a pilot, and the doctor put something down about “depressive disorder” in her chart.
She then put out a youtube video about her experience with the IUD, and someone reported that video to the FAA, who then demanded she see an FAA-approved psychiatrist.
Said psychiatrist apparently had no clue what IUD’s were or how they worked, and essentially diagnosed her with “female hysteria”, so the FAA revoked her medical on that basis.
Obviously, there’s two sides to every story, but I find it completely believable that an agency which responds to mental health issues by essentially reminding pilots “It’s illegal to not inform the FAA if you were ever sad” handled something mental-health related in a spectacularly dumb manner.