its possible that you hurt your stomach, i've had friends that got ulcers arround 16, so its not impossible, esp if you drink... no nicotine poisoning won't kill you, at lower doses... its more like a severe allergy than anything... i too have an upset stomach every morning... and have never been a morning eater because of that. my advice again is pick up a pack of djarum cloves if you feel the need to enjoy a smoke after your smoke, no tobacco or nicotine, and you still get to light up if you feel the need.