Just because you drank regularly do not automatically assume this may be liver related, or even related to drinking. It could be heart related, BP related, lung related or even a tumor pressing on the Iliac vein. Or something less ominous.
I mention the various ominous ones (if untreated) because you need to determine WHAT is the cause so you can treat it before damage occurs.
As am RN let me tell everyone that similar symptoms can often be from different organs. Never assume it is the obvious body system.