Hi i have a really strong pulse in my stomach,u can seemy belly jiggle up and down with each pulse. i am only 23, no family history. When i pressmy fingersright down u can feeleachthud harder. ihad a abdominal echo2years ago and it was normal, i have had a heart echoand ecg's alll normal and throid and blood tests, also normal,, anyon help me what couldit be x