Random sleeping as a stress symptom?

O.K, so I used to have a problem with randomly getting sleepy and sleeping in the daytime when I lived with my husband and his grandmother, she and I never saw eye to eye and I always felt stressed. I left that situation about 2 years ago, and moved back in with my folks. This problem of sleeping at unforeseen moments gradually came to a stop. I now have a dear friend Living with me and she has some of the same personality traits as the Grandmother, and I am beginning to find myself getting sleepy at random times again, not quite so badly yet though. Could it be that this is a symptom of my stress with having to deal with some of the same issues again? What do you think?