Hi.
Read your history, noted your symptoms and findings at a later dates, reports and understood your problem.
The pain in the right upper abdomen with all normal tests done repeatedly, but developing the slight swelling and and a faint
bruise in upper right back is suggestive of the following:
Lung or a
pleura pathology on the right lower side.
or Upper part of the liver inflammation
or problem bellow the right diaphragm.
or
gall bladder stones with inflammation. (
ultrasonography not mentioned by you.
I would further advise you the following investigations.
First of all to go for an X-ray of the chest to see for the lung and / or pleura pathology
Ultrasonography for the pathology of liver,
pancreas, gall bladder and pleura on the same side.
Routine investigations of the blood, including that for liver function tests.
The treatment will necessarily be dependent upon the findings of the reports and to follow for an appropriate treatment.
I hope this answer helps you to get an early diagnosis and treatment.