Here's a shot in the dark: Maybe the baby represents some responsibility in your life that you're carrying. Maybe the other woman represents the help that you need in order to succeed in carrying out the responsibility. Arriving at your destination without the baby and not being allowed to go back may represent your fear that you will fail at carrying out your responsibility. If there is something heavy going on in your life right now, my suggestion would be to ask for help (symbolized by the strange woman in your dream). Never be afraid to say, "I can't do this alone."