My elderly mother (85) has been in good health. But, for the last 3 months she has been shaky, nauseated and headachy, and has lost over 16 pounds. She's been to her doctor and has got to Emergency over 5 times - all tests given came back clear. The doctors have mentioned that it might be stress, since there is nothing they can diagnose. If this is stress, what can she do to relieve the stress? As far as she tells us, there is nothing that she is seriously worried about.