For the practical day to day dealing with an abusive spouse / soon to be ex / ex… Domestic Violence support groups / shelters / resource hubs (which also usually includes access to lawyers who specialise in DV cases. Not just the divorce but the ongoing slog of dealing with someone determined to ruin you. Name changes. Mail/bills/school letters etc. being funnelled through a state facility in the capital before being directed to your real address, etc., etc., etc.,).
Whilst a number of people in DV Support ALSO have PTSD? Either from the abuse, or pre-existing from earlier trauma? The overwhelming majority do not. They’re suffering the effects of abuse, and those effects are both alarmingly similar, and very very different, person by person. In ADDITION to PTSD there will be men, women, & children with about a dozen or so different disorders & conditions
from / exacerbated by the abuse, and about 20% will have disorders or conditions they were born with ON TOP OF the effects of abuse. So DV specialists usually specialise …wait for it… in DV.

With only passing knowledge of the dozens of trauma related disorders & conditions, and hundreds of psych conditions. Enough to usually be able to direct people pretty accurately to further specialists. (Trauma therapists, addiction programs, OCD therapists, eating disorder clinics, therapists who specialise in various mood disorders, like depression, therapists who specialise in personality disorders, like BPD. Et Cetera. Et Cetera.).
As you’ve already been diagnosed with PTSD, that makes it easier… Use the DV Support to deal with the DV aspects, and find a trauma therapist to help you with the PTSD aspects.