Who uses a baby sling? I need help figuring out how to use one!! Can you use it if she doesn't really have head control yet? Because I tried kinda laying her in there and she hated it. I may have done it wrong though. I'm trying to find pictures, but I kinda need someone to walk me through how to do this. LOL. I have several of the slings that are the ring slings like the first 2 pictures above. Who can help me??