What test is the best test to look for pancreatic cancer I'm scared? I have abd pain had mri/us/ct only thing it show is gb stones or polyps please help

Imaging studies best. The tests you had are very sensitive for finding pancreatic masses. If they show only stones then that is the likely reason for pain. Pancreatic cancer is rare at your age and stones can commonly cause pain and are far more common in a young woman. Blood test for ca19-9 can be used but is not specific for cancer.
Eus. Pancreatic cancer in otherwise healthy 31 year old patient is incredibly rare. However the most sensitive test is called endoscopic ultrasound, or eus.