Hi, I have been diagnosed with small nonshadowing gallstones or polyps in my gallbladder (the ultrasound is not clear). What should I do now?

Depends. It depends if you have pain or symptoms or not. If asymptomatic, you could observe it for now.
It depends. If you have no symptoms, simply repeat the ultrasound in 6 months. If there are epigastric or biliary-like symptoms, an upper endoscopy and repeat ultrasound (perhaps on a much more sophisticated machine at a large diagnostic facility) should be done. Small polyps generally have no symptoms and can be watched.