You should talk to your doctor and have followup tests to find out what is causing your liver to be enlarged. Being enlarged is a symptom of an underlying condition or disease.
You should be seeing a gastroenterologist (digestive disease specialist or a hepatologist (liver disease specialist).
Hector
I will try to reply to your question.
If your liver is enlarged, then your doctor will probably do some more tests to try to find the cause for your enlarged liver.
Have you been tested for Hepatitis A, Hepatitis B, and Hepatitis C?
I copied this from the Mayo Clinic site:
Many diseases and conditions can cause an enlarged liver, including:
Liver diseases
Cirrhosis
Hepatitis caused by a virus — including hepatitis A, B and C — or caused by infectious mononucleosis
Nonalcoholic fatty liver disease
Alcoholic fatty liver disease
A disorder that causes abnormal protein to accumulate in your liver (amyloidosis)
A disorder that causes copper to accumulate in your liver (Wilson's disease)
A disorder that causes iron to accumulate in your liver (hemachromatosis)
A disorder that causes fatty substances to accumulate in your liver (Gaucher's disease)
Fluid-filled pockets in the liver (liver cysts)
Noncancerous liver tumors, including hemangioma and adenoma
Obstruction of the gallbladder or bile ducts
Toxic hepatitis
Cancers
Cancer that begins in another part of the body and spreads to the liver
Leukemia
Liver cancer
Lymphoma
Heart and blood vessel problems
Blockage of the veins that drain the liver (Budd-Chiari syndrome)
Heart failure
Inflammation of the tissue surrounding the heart (pericarditis)
Tests and diagnosis
Once your doctor determines that you have an enlarged liver, other tests and procedures may be recommended to learn the cause. They may include:
Blood tests. A blood sample is tested to determine liver enzyme levels. This can give clues about the health of your liver. Blood tests can also identify viruses that can cause enlarged liver, such as the hepatitis viruses.
Imaging tests. Imaging tests include computerized tomography (CT) scan, ultrasound, or magnetic resonance imaging (MRI).
Magnetic resonance elastography uses sound waves to create a visual map (elastogram) of the stiffness of liver tissue. This new test is noninvasive and can be an alternative to a liver biopsy. Magnetic resonance elastography is currently offered at relatively few medical centers, but it's expected to be available at most major medical centers soon.
Removing a sample of liver tissue for testing (liver biopsy). Your doctor may recommend a biopsy to collect a sample of liver tissue for laboratory testing. A liver biopsy is often done using a long, thin needle that's inserted through your skin and into your liver. The needle draws out a core of tissue that is then sent to a laboratory for testing.
http://www.mayoclinic.com/health/enlarged-liver/DS00638/DSECTION=causes
I hope this helps to answer some of your questions.