have you received messages in dream state before that you have under stood because I found it interesting that you were going to call him omkar and your sister changed it to om as The symbol representing Om is called the omkar, representing the four states of human awareness:
it could possible mean your messages will come in dream state so be more aware of your dreams on waking- but that's only a guess

I think the baby probably represents an undeveloped male aspect of yourself (you immediately claimed it as your child). Probably a part that was repressed early under pressure from your family (relatives abandoned the child as a baby) It's coming up now because that aspect is now needed in your life -- for example if you are female you may have been encouraged to "be nice" and discouraged from being aggressive, but now you need to become more aggressive in your life --thus your Parent aspect to bringing back the abandoned aspect.

Just offering this up as a possibility. You yourself are the best person to figure out what the dream means.