Thats interesting
Ive only recently started meditating so I'm probably not the foremost authority on the subject. The way you described it though sounds like it would be almost more unlikely that it didn't have any meaning than if it did. I mean you say you've been talking and thinking about having kids lately. Then you receive this vision in bed of two kids which you immediately identify with. Unless you normally receive this vision it would be highly unlikely that you weren't tapping into something. You say you prayed as well, in my experience prayer is very real and does work.
From what I understand one of the ways you receive intuitive communications, images et cetera when meditating is because mediation raises your vibration. You've probably been reading and learning more spiritual things and/or growing alot spiritually lately (we all have) which would result in a raise in vibration and hence this intuitive communication about children. Id recommend paying attention to it and maybe meditating on it or even lucid dreaming about it. Thanks for sharing I hope everything works out well for you.