Larissa;
You hit the nail on the head. Often victims of domestic violence after it is over and they are safe somewhere..and I mean months or years after, have a hard time dealing with the quiet. They are so used to chaos that anything different seems wrong.
When we are happy, contented, serene, either we feel like the other shoe will drop anyway, or we do not deserve the happy feelings.
You can change this thru therapy and focusing on the good stuff and using positive affirmations. It will take a while for your brain to reprogram itself but with therapy and work on your part you can change and realize you deserve the happiness and serenity and its o.k.