Pain in right upper ab, through side and back just under ribs normal lfts ab ultrasound and cbc ex for slightly elevates lymphocytes. What could it be?

Gallbladder-like. Your symptoms suggest gallbladder origin, but there can be other mimics. Carefully associate the precursors of the pain (fatty foods, etc.) to see if it is the GB. Muscle dysfunction in GB or other areas may be at cause and would have normal US and blood findings. Functional xray tests may help confirm dx.