I have been having nausea and vomiting off and on for the past 3-4 months. Seems to be getting closer and closer but this week I started taking charcoal pills and I seem to feel a little better. My doctor thought it might be metal poisoning but tests came back negative. should I go to a GI doc? someone told me it could be stress, been under a load. I m 75 and fairly healthy no diabetes, heart, arthritis problems. thanks, Niurka