I decided to change this post after realizing how much irrelevant rambling was in it so sorry for changing it up on you if you've already seen it. I just didn't want to overload you with stuff that isn't important.
There is one thing you might try as far as helping with flashbacks and body memories that I have personally found helpful for myself. When you start getting a flashback or body memory, try rubbing something soft with your fingers and focus your attention as intensely as you can on that sensation.
If it works for you like it works for me, it will take the edge off a little.
There is something I'm wondering about. Do you think your dad might have known about the sexual abuse the whole time? His participation in it this last time makes me wonder. I really am extremely concerned for you and feel you should think again about going to the embassy in Bangkok.
The fact that you were victimized again, even though you are physically able to defend yourself does not mean you are weak or that you wanted the abuse, it just means that you suffer severe post traumatic stress from what had happened to you already and it set you up to be abused again by disabling you.
I know because it's happened to me as an adult! Brain shuts down and your a helpless zombie! Please don't judge yourself or beat yourself up for having that reaction--it's very common and is part of how we are affected by our abuse.