Had a gallbladder stone 1.6 CM in fall, repeated test stone now 2.1 cm.  now what? Dr says it's very large. Having a lot of stomach problems

Size unimportant... ...But, symptoms are. If your stomach problems are due to your gallstones, this is easily treated by outpatient minimally-invasive gallbladder surgery. In fact, this is one of the most common operations performed in the us. I recommend that you see a general surgeon for further information and treatment.
Stone. All depends where is localized, liver ducts, .......Recommended to see a gastroenterology or surgery, determine if you need a surgery for avoid latter complications .