What to do if i have a sharp stabbing pain in my lower left pelvic area. help?

See a doctor soon. : It could be a lot of things , but it is an indication for a doctor to examine you.

Ortho causes include: A pinched nerve in the back, due to arthritis, slip disk, injury or a space occupying lesion; or pain from bursitis, arthritis hip, meralgia paraesthetica (like carpal t syndrome, where a local nerve to the thigh gets trapped under a thick ligament against the pelvic bone. Non-ortho causes: abdominal like constipation, diverticulitis, colitis, hernia pains, etc. Check with your gp for the dx..