I am experiencing sharp chest pain, with no other symptoms, mid sternum to back, > 10 minutes. NO sweating/clamminess, no pain radiating into left or right arm, no jaw pain, some pain in area of right ear... no rise in pulse ( 78BPM), B/P 125/78, no prior history of heart issues other than PAC's, which I am not having. May be intestinal, as sometimes this happens when eating, but seems to not be subsiding. Thoughts?