Leg Pain

I just don’t know if this is something worth calling my doctor about and I don’t really have the money to spend at labor and delivery if it’s just nothing. Suddenly my leg just started hurting out of no where. It almost feels like an intense charley horse, but my entire leg feels cold, but not cold to the touch. The muscle doesn’t feel rock solid like a Charley horse does either. It hurts to walk. I’m trying a heating pad on it right now, which I can’t tell if it is doing anything. Has anyone else experienced this?