The Psychologist, Shirley Glass found that betrayed partners almost always suffered from a form of PTSD.
In a similar way to how a soldier may feel after returning from war, betrayed partners are hyper-vigilant and on guard for enemies hiding behind every tree.
They may also experience flashbacks or intrusive negative thoughts in which they imagine their spouse together with the other person.
These thoughts often bring on bouts of rage, panic or numbness. They may also suffer from nightmares and insomnia.
No matter how many times their spouse apologizes, their intrusive thoughts are difficult to stop. They are at the mercy of their PTSD.
It is important to take your feelings seriously and not to expect yourself to just ‘get over it’. This is a difficult time and seeing a therapist might help you to make sense of what is going on.