my pain feels like a heartbeat,but painful

its under the right rib cage id say: cause

when i sit up' i can kinda feel a mass' & its

painful.

ive had ultrasounds,cts & so far the ONLY thing

they show are simple cyst on the liver lobe. i DONT

know what the pain can be but its UNBEARABLE!!

another ct scan will be done on the 14th again with 

dye. any help here??