I woke up this morning with a blue tongue and blue mucus when I cleared my throat. I DID drink grape gatorade last night and throughout the night as my bedside drink. I am also a smoker and am about 30 lbs overweight. I am worried about my the blue tongue but I am pretty sure it is due to the grape gatorade. On the other hand I read this could be signs of a pulminary embolism or COPD or other certain heart diseases. Please advise.