I have such bad ptsd from my ex abusing me for months that anytime I'm alone I think someone's in my house or trying to break in.
How did this feeling come about in you?
This feeling started when my ex would beat me up every time I was alone at home.
It was wrong for him to do that. You should seek professional help for this. You should not feel this way.
Who do I contact?
There are many resources on line about people giving out mental health help. You can find a website or a phone number of an accredited professional.