round ligament pain

Has any of you ladies experiences this type of lower groin pain? How long did it last? Is it harmful to the baby? Am suffering with what I believe to be round ligament pains for three days now! One I stand up I feel pains in the lower left part of my tummy or groin area. Lifting my left leg to walk or put on my undies is a sore bitch!!! Am a first timer so don't know if this is part of the process or should I be running to the doc!