Nothing to worry.
By your name,it is evident that you are from a Tropical country,where infections like Malaria
etc are common.So,Mild hepatomegaly
in your case is just an incidental finding or any previous infection might have lead to hepatomegaly.
As you are Non alchoholic,Liver function tests are normal,no need for further investigations.
There are no lesions in the liver like abscess,Cyst etc .
Eventhough if it doesn't come to normal size,no need to worry.
It has excellent capacity of regeneration.Eventhough 75% of liver is lost due to trauma,it can regenerate into whole liver.
Please stop worrying.
Wish you good health.