Kimberley Nixon is publishing a memoir about her battle with perinatal OCD, the intrusive mental illness that struck after her son's birth during lockdown. The Welsh actor experienced a flood of disturbing, unwanted thoughts centered on potential harms to her baby. Racing thoughts and relentless rumination consumed her, playing out what she describes as "Technicolor horror stories" in her mind.

The condition left her isolated and in darkness, a plunge that fundamentally changed her life. Nixon's book, "She Seems Fine to Me," launching May 7, holds nothing back in documenting the experience. She expressed nervousness about publishing such personal material, questioning whether the decision was brave or foolish given how taboo the subject remains.

Perinatal OCD is a postpartum mental health condition distinct from postpartum depression and postpartum psychosis. It involves intrusive thoughts and compulsions that create severe anxiety. The condition often goes undiagnosed because sufferers feel shame about their thoughts and fear judgment.

Nixon's willingness to discuss her recovery and the strategies that helped her offers a public platform for a condition many mothers experience silently. The memoir aims to reduce stigma around mental health struggles in the postpartum period and encourage others to seek treatment rather than suffer in isolation.