HI.
Thanks for a perfect book-picture type symptoms you have noted.
There is an inflammation of the Liver and / or under-surface of the diaphragm.
The most common cause of an
abscess in the upper part of the liver.
Another causes are irritation on the diaphragm by abscess.
There is a possibility of a Cancer of the liver.
This is also causing the
referred pain to the collar bone area, worsening on burping or hiccough.
I would advise the following:
Blood tests - routine, wbc for infection, blood sugar to rule out
diabetes. Kidney functions, liver function to determine the damage to the liver.
Urine
Stool
Ultrasonography to start with and may be necessary as a guidance for biopsy and / or aspiration of the abscess / mass.
CT scan to confirm and to plan the treatment.