What you are experiencing is likely palpitations in your abdominal area (which would likely point to the abdominal aorta ).
It would be good to visit a vascular surgeon for a detailed consultation to rule out conditions like aortic dissection and aneurysms.
You may also benefit from a 24hr ecg monitoring if the abdomen is cleared by the vascular surgeon and your looking for more systemic or cardiothoracic / endocrine causes of the palpitations.
Abdominal aortic conditions can be life-threatening, so an earlier visit to see the doctor may be warranted.
