Memory loss

I'm pretty sure I must have the beginning signs of dementia. When you are in a strange land driving a strange car... I'm sure I could probably win a funniest home video prize if someone were taping me. About 90% of the time when I come out of a store not only can I not remember where I parked but I can't remember exactly what the car looks like.(I do actually remember that it is silver but there are soooo many little silver cars out there). I feel like a complete moron looking up and down the rows for my car. This has happened several times this week. I do want to go on record to say that when I am home in familiar territory this rarely happens!!!!!