Dear Rothfan6: know your post is a few days older, but wanted to reach out to you... I often feel this way (fearful for no [apparent] reason). I don't know if this is true for you, but usually there is some kind of trigger, however small, that sets off such deep fearfulness. Maybe it will be so for you?

I don't think it's childish to find a place to hide. I believe as long as I'm not hurting myself or others, I think it's okay to soothe yourself. You did what you needed to.

When I first got PTSD, I'd move furniture in front of my bedroom door, push the desk back and build a blanket nest there, where I felt safe with my cats. My sister and her partner (whom I stay with) even built me a special bolt for the door (built iron brackets into the doorway, designed a thick wooden bolt with iron handle so I could easily push it into the brackets and secure the door.) It looked medieval, but really helped my anxiety/me feel safer.

As time has gone on, the bolt was gradually removed, the furniture stays in place. But I have a lock on my door, and when I feel scared I still allow myself to make my nest and snuggle with pets.

I found, too, that having a "flight bag" [things I would need if I had to make a run for it] handy settled some of my anxiety. I still keep an aluminum bat under the bed. I've never had to use it, but it makes me feel more secure. Therapy and medications are helping, too.

Take care; please don't be too hard on yourself - being alone when having PTSD can be a daunting situation.