I have been losing memory of mundane tasks?

this is the second time I have suffered from this in the past few months.....For the past 3 days I put a task in my head and then the next thing I remember I sort of come to starting the task. Example I think I need to go stir dinner and then next thing I am aware of i am standing in the kitchen holding a spoon. It is quite alarming to bounce through my day forgetting all the in between bits immediately. As I said this is the second time I have gone through this the last time it was 3 days. My doctor says depression and stress. This time though it started the day after I got back from vacation I was well rested and feeling awesome still do except for the new stress of my concerns for my memory. Any suggestions would be greatly appreciated,