Paranoia after giving birth?

I have always been a very cautious person. My husband works in law enforcement & we met in college where we both majored in criminal justice. We are both very aware of our sorroundings and just more "on our toes" than many others. But ever since I gave birth, it has been out of control for me. The day after I gave birth, I showered at the hospital. While in the shower, I became terrified that someone would come in and rape me. I was still very weak and obviously incredibly swollen after having a vaginal delivery. I was so scared that I rushed through the shower and almost slipped while hurrying out of it. Now that we're home, I have become terrified that someone will come into our home and attack us. We live in an apartment in a very safe area, I have no reason to feel this way. Every time I sleep I have nightmares either of men coming into our home and raping me or taking the baby or of us being out in public and a shooting occurring. Everytime someone knocks on our neighbors door or I hear them putting the keys in their door or a car drives by or even just the wind blowing the wreath on our door- my stomach drops and my heart races. I have no signs of postpartum depression, other than the paranoia I am overwhelmingly happy and loving being a mom. Does anyone else suffer from this? (I'm 1 week pp btw)