[4] She wrote and performed shows in each of the four years 2010–2013 at the Edinburgh Fringe: Clinical Lies in 2010; My Best Friend Drowned in a Swimming Pool in 2011; National Student Drama Festival award winner Kiss Me and You Will See How Important I Am in 2012; and Substance in 2013.

[5][6] For her performance in Broken Croí, Heart Briste during the 2009 Dublin Fringe Festival, she was nominated for Best Supporting Actress at that years Irish Times Theatre Awards.

[15][16] In a review for the Irish Independent, Meadhbh McGrath writes, "O’Connor has a powerful skill for delivering searing monologues, but the success of the play rests on the strength of the two characters on stage, and there is a striking imbalance.

[16] Laura Collins-Hughes writes about the main characters in a 2020 review for The New York Times, "They speak of their separate traumas in monologues peppered with rhyme, which sounds natural in O’Brien's mouth, self-conscious in O'Connor's.

"[18] Claire Brennan writes in a review for The Observer, "O'Connor tackles the subject of a woman struggling with self-harm and heartbreak bravely, but she hasn't yet quite managed to find the form for the material that will transform it into drama.