This is so hard to deal with, I have been there. NC is so hard to accomplish. For me, it was just really believing, getting it into my head that he really was as bad as I thought, heartless and cold and selfish. He is not capable of empathy so that if I looked to him for it all I was going to get was more pain. I just found it so hard to really accept it, accept the truth of him.
A couple of things that work for me, I still use them now.
I text a friend whatever I would like to say to x. I spoke with them before hand so they would not think I was nuts.
Sometimes it was just a simple phrase sent back to me that would keep me strong, remind me to protect myself. My favorite lately, "don't feed the monkeys". Story behind that and it makes me laugh which is also helpful.
The other thing is to post here. Just get it out, doesn't have to make sense, just vent.
I have also pm'd with a couple of members and that really helps also.
Another thing I do to quiet the anxiety. I am stressed about money also, the future, the unknown, all those things that we can't really control. I tell myself, "right now in this minute I am safe." Sometimes just getting in touch with the reality of the moment helps me to calm and then think calmly about the steps I can take to work on any practical steps that I can take to improve my future.
NC is such a battle. I posted here yesterday about how it is the key to healing. I had been total NC for 8 days after D. He texted me yesterday and I was forced to respond because he was going to invade my space, my home turf, I had to defend myself.
It sent me into such a full blown anxiety attack. It showed me so clearly how much better I felt with NC. I had been posting about how much better I felt, calmer, more optimistic, more focused.
The contact sent me into a tailspin. The one positive that I did get out of yesterday. I survived it, I didn't need to take medication, I was calmer after about an hour. I realized that I have the control, he cannot hurt me unless I allow it. The final D and court orders protect me.
NC, it really helps once you can achieve it. If you slip though don't beat yourself up. Just start over again. I think that we struggle with it because maybe we expect them to be the humans that we thought they were. It is hard for us to wrap our brains around what they really are because we could never treat another as they have treated us.
I wish you strength, it will come, it really will.