Right flank pain and pain in right groin and back. variable chest pain (non cardiac) as well. is this more likely from gall bladder or kidney stone?

Kidney stone : Flank and groin pain are often caused by kidney stones that cause some degree of obstruction to the kidney or ureter. There are multiple other causes, however. You should seek a diagnosis.

See below: Pain due to gallbladder disease (e.g.Stones), is located in the right upper quadrant/epigastric area and the onset usually follows a fatty/greasy meal (pain is constant and goes away in a couple of hours). Pain due to kidney stones is colicy (comes on about every 15-20 min and lasts a minute or so) and may be accompanied by urinary frequency/urgency. Kidney stone pain is very severe.

Both: Get blood work and urinalysis. An abnormal parathyoid could lead to both.