Okay, here is how it all worked out this morning when I got freaked out, thanks to you guys. I am back at my sons, so alone in a house again. I was sitting at the kitchen table and felt a cold draft. Wasn't quite certain I felt it so continued on. Next time I went past the hallway towards the garage I noticed the door to the garage open, so cold air was coming in. Hmmmm. I didn't leave that door open....
Then my head went back to this posting. As my chest tightened and I went back to those same old scripts, 'who did that', 'I am careful with doors', 'how did someone get in' and so on, I recalled the challenging statements you guys made in this post. I closed the door and walked away. I have no idea why the door was open. I will leave it at that. Thanks guys.