I'm really scared got a pain which feels like it In my upper left rib that comes and goes where my bra strap is I'm so scared it's panceatic cancer?

Not pancreatic cance. from your description, I cannot tell you what is causing your pain, but I can tell you that pancreatic cancer does not usually present with pain such as this. Pancreatic cancer is usually pain-free, with unexplained weight loss or jaundice. If your pain persists, I would see your doctor. Good luck.