I've been feeling really sick for 4 days now. nausea from morning until night, and a bit of diarrhea. i've tried tums (calcium carbonate) and pepto bismol, not helping.

Gastroenteritis. : This sounds like a case of acute gastroenteritis, either viral or food-borne. Typically these episodes last three to five days and are treated conservatively. Should this last longer than seven days, then you should certainly see a doctor locally for testing, just to make sure nothing else is going on. For now, fluids and lighter fare in the diet.