My WAW also had violent PMS. She was on AntiDepressants for it and went cold turkey before she abandoned us. (Me D16 and S8)
I can empathize how hurtful it is to have your W flip on you, go "crazy" based on the same behavior that you had the day before.
One thing that I noticed made my W worse was that if she was guilty, or hiding something that month the PMS was considerably worse. I am assuming your W had the same pattern. It may be worth communicating that one right there, the value of honesty = sanity.
Me: 35 Her: 33 D : 16 S : 9 Together: 14 years Married: 12 She left 4/14/2014 Separated: 5/25/2014 OM Confirmed 7/2014 She filed 8/7/2014 I Filed 10/21/2014 Divorce final 2/12/2015