I am 33 yrs old female. Height 165cms and weight 64kgs.  I am having chest and upper back pain.. when i lie down, i could feel sharp pain. if i sir straight or walk i don't feel pain at all. It's like something stuck on my throat and whenevr i swallow my saliva, the pain goes to center of the chest and radiates to ride side chest and upper back...i also feel like passing stools when I get this pain and burp frequently during pain. If I keenly observe the pain is actually at my back(right side) & radiates to chest . Is it related to heart?