Losing my mind

I am pretty sure I am losing my mind. Yesterday after work I went to Menard's to take my ceiling fan back. It was just starting to rain so I ran and got a shopping cart and put it in and locked the doors to my car and then went into the store. Well when I went back out to my car with the new fan I discovered that I did not shut the trunk on my car. It was just sitting wide open and of course by now it was poring rain out. So I am sure I have totally lost my mind!!!!!!
Sharon