Aorta beating in upper abdomen, should i be concerned?

Aorta perception: Better that it is beating than not. The aorta can be felt through the skin in many people, especially if you are thin. When you start to go to sleep, sometimes you become aware of all sorts of heart beats/blood vessels. So this may be normal but a new awareness. But feeling your aorta raises the question of an aneurism that may be expanding, and that would be serious. Talk to your doctor.