last week i had mild chest pain. specific heart area and out my armpit. have exhaustion. but the thing that worried me was extreme stickiness in my mouth and upper throat - could not quench it. it was after small amount of busy movement . I went to an instacare clinic and they suggested i go to the ER. Like i said it was very mild and i CHOSE to see if it subsided and if my symptoms got more intense i would go. a few days ago, i had a mild sting/discomfort on the left side of of my throat just lateral to the ribbing of my esophagus. i waited and it went away. today i have the same sting/discomfort on the right side of my throat - again just lateral to the ribbing of my esophagus just superior to my right clavicular notch. I self diagnosed myself from the internet. and my symptoms (which could indicate drastic things like congestive heart failure) i diagnosed as pericarditis - because i am still trying to fight off some infections like sinus, uti, etc. the stinging has lasted 6 hours. So my question is...is it unwise to continue to wait to get those expensve tests at the ER.