We need your help deciding on a baby name

We have been having such a hard time deciding on a name for a little girl. We still don't know what the baby will be but are trying to get prepared since time is winding down. As of this moment a little boy would likely have a name (we've agreed on that already) but if it's a little girl she would probably have to be called "Baby Girl Tyree" until we could decide on something. We've narrowed it down to 3 - well, as of today. Anyone who's talked to me knows I've changed my mind on the names and the number in the running many, many times over the past few months. So far we've got 1. Sofia, 2. Alexa, 3. Lauren. We think these are all very good names but we can't think of middle names to go with them. Maybe if we can figure out some middle names to go with these we may be able to figure out which one would fit best. I'm guessing the baby will still be born without a name if it's a girl because with all the thinking I've done about this I almost want to meet her before I decide which one suits her. It's kind of fun wondering what sort of surprise is awaiting us!
I have made it to 33 weeks today! Every day I feel better about carrying this baby to term. Jaden was born at 32 weeks so, this baby already has 7 days longer in the womb to grow and get stronger. Things are looking good - there doesn't seem to be any reason to think this baby should come before it's supposed to. Despite having had an abruption with Jaden the doctor assures me that the chance of that happening again is very slim - especially since it was very unlikely with Jaden as well. But, we've still got six more weeks to go so, continue to keep us in your thoughts and prayers.