rats in dreams

For the last two nights I have been having dreams with rats/mice in them. They are just running around on the floor. I have a feeling I am at home when this happens, but I really can't recall. I don't remember much just these little rodents running around, one of them looked very vivid, like a cartoon. Gray little body and bug black eyes. I wake up and I am uneasy after dreaming this. What does it mean? I hardly ever remember my dreams but twice in the same week has me asking.