Physical & Emotional Abuse Support Group
Abuse is a general term for the treatment of someone that causes some kind of harm (to the abused person, to the abusers themselves, or to someone else) that is unlawful or wrongful. No one deserves abuse, period. Abuse can be emotional, physical, or sexual.

Actually PTSD can cause what you describe. I was very hypervigilant after my ex left. So many things startled me, and often my imagination would get the best of me, as in thinking he was there...behind me, waiting or something! Even though it was very unlikely, I soon found out it was a normal response to the trauma.
Please continue therapy, and reading about PTSD, it'll help.
It does get better. You can do this. You are so strong to not be listening to his BS.
I can feel the strength in what you write.
If you don't have kids or any other reason you HAVE to be in contact with him - just don't be. At all. Nothing. It's the best way to heal. If you do have to be in contact with him, keep it strictly to the reason (kids or whatever) and hang up or ignore anything outside of that.
It's hard work, but it gets easier and it helps SO much.
The goal posts shift CONSTANTLY with these guys.