I've been doing EMDR for approximately the last 7 months on and off. It started with a car accident and developed into multiple traumas throughout childhood and College. I learned that everything that affects you as an adult somehow relates back to something that happened in childhood since I suffered constant abuse of all kinds as a kid this leads to very complex case for EMDR although it's taking a while I am starting to see some improvement. Some more trauma you've experienced in your life the longer it will take but it does work. I won't lie though be prepared for things to get worse before they get better. I would suggest before you begin EMDR make sure you've given your therapist a pretty solid background of your history of abuse so they can plan accordingly they may want to provide you more grounding tools before actually starting the memory processing. With EMDR you are always in control you can always stop at any point during the session and you don't have to tell the therapist what's actually in your head as long as they know that processing is continuing they're fine with that. I would discuss any questions you have though before you begin good luck to you with whatever you decide.