Do DH has gone to the shops (a short trip on motorway required) he's taken our youngest while I'm at home with eldest getting Sunday lunch ready. He said he would be an hour. He's 20 mins late. I'm starting to feel anxious to the extent I'm imagining they've been in an accident and how would we cope? I'm playing worst case scenarios in my head. I do this a lot. I know AIBU. Is it normal though? Or am I suffering from anxiety?