When I was little I was raped by my uncle and grandfather for years and was diagnosed with PTSD. I went through self mutilation, an eating disorder, a suicide attempt and I got pregnant before anybody found out I was going through anything at all. It took me lots and lots of therapy and work before the flashbacks and nightmares stopped. What worked for me was getting on a scheduale, like the person before me said. A part of PTSD is having your life dissrupted, and having a routine helps that.
Although I know you want a quick answer, and everything to go away right now, I'm sorry to say that it dosen't. All of this did not start over night, therfor it will not go away over night. You have to find what works for you. For me it was my children (when I got pregnant, I got pregnant with twins), and showing my uncle and grandfather that I was a stronger and better person than they were. PTSD is a VERY difficult thing to go through, and to survive anything that brought you into an illness like this makes you an amazing person. Making yourself suffer is just a way of showing your ex and everybody else that they hurt you. I know, and trust me I DO UNDERSTAND, that it's hard, but try to focus more on what you can become of this, instead of what happened. I think you will be amazed at what you can accomplish.
If you ever need someone to talk to, I am on here many times a day, will try to understand whatever you say, and will reply
May God bless you,