In the past few days i have experienced abdominal/pelvic pain when sitting up from a laying down position below the belly and sharp across the region?

Hard to say: You have not provided enough information to provide a good answer. This can be caused by abdominal muscle pain from over use; abdominal visceral pain from appendicitis, constipation, gas, ovarian cyst, or tumor; dissecting abdominal aneurysm; a disorder of the lumbar spine; or a bladder infection. Persistent pain is an indication to see a health care provider for a more thorough history & exam.