I just wanted to share that I had a family friend who was in Phuket during the tsunami and it was very traumatic for her. She was on the beach and had to run from the wave. She had to run in her bare feet, did not have time to get her shoes, and she had to jump and climb over fences and cut herself up really bad. That terrifying experience combined with witnessing the death and destruction around her was destabilizing for her. She did eventually get over it though. She did not have any substance abuse issues, and I really feel for you that you do. I'm sure that made her load lighter.
I have a mental health issue and a substance abuse issue and it can be confusing and overwhelming: is it the chicken or the egg? What can I do to SOLVE this? And there is a shortage of good 'dual diagnosis' counselors.
For me, I found it essential to get sober first. And then work on the other stuff. That was what worked for me, in terms of prioritizing things, but everyone is different.
I'm glad you are reaching out and sharing. You're not alone.