Fast heart beat, nauseous, dizzy, feeling full but hungry what symptoms is this?

Gee, you can Google your symptoms for a list of what they may be associated with. You could have diabetes, thyroid abnormality, anxiety, heart problems, bulemia, dehydration, drugs or medications (alcohol, tobacco, marijuana, cocaine, other illicit drugs, over-the-counter or prescribed medications, etc.) and a bunch of other problems. If this persists, check it out with a health care provider

They are not specific to a particular problem or illness. Far too many conditions have overlapping symptoms like this no comment. If you are concerned, write all the symptoms down with time they started And take the list to a doc visit.