Can a trauma bond still exist after leaving your narcissistic ex for a year almost two years? and is it similar to a heroin addiction?

For those that have experienced narcissistic abuse. I was making a research that trauma bonds still exists can be felt even after being broken up with the narcissist but if that is true then the way I been feeling lately is because I’m still addicted to my narcissist. My stomach feels anxious I feel my heart racing at a fast pace, I feel weird at night, I feel like I need to self harm or do something so I won’t feel that way anymore for a while.
Can a trauma bond still exist after leaving your narcissistic ex for a year almost two years? and is it similar to a heroin addiction?
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