What could cause chills, with out fever? I'm not sick at stomach, don't have cold or flu. I've been having these chills about 1 month now.

Chills. Chilling is the body's way of increasing the body temperature when you are about to develop fever. The fever may not be present while you are chilling. The other thing that causes chilling is exposure to cold. In that case you should be aware of the association. There are some women who experience chilling as part of menopause.