Hi, Sean —

To my knowledge, we know very little about Our Blessed Mother other than what the Scriptures tell us, like:

• What year she was born and
• What year she died and was assumed into Heaven.

These are the only sources I could find:

• New Advent article on Mary
  This does a pretty good job of giving you all the possibilities of when and where major events of her life occurred.
• Wikipedia article on Mary
• Subsections of this Wiki article
  — From the New Testament to Perspectives on Mary (From the Catholic View)

Although it would hold no historical or doctrinal weight that we can rely on, this book may be of interest to you.

• The Life of the Blessed Virgin Mary: From the Visions of Venerable Anne Catherine Emmerich by Anne Catherine Emmerich

Catholics are not bound to believe any visions from any saint or supernatural apparitions.
Issues talked about in the above book would fall into the area of theological opinion:

• The material in the book may be true; but may not be true.
• You can believe the content in the book; but are not bound to believe it.

Here are some related postings that deal with certain aspects of your question:

• Why was nothing recorded of the life of Jesus from when he was a baby until His Public Ministry?
• Was Mary assumed alive into Heaven or did she first die and can a non-Catholic be an Oblate?
  

Hope this helps,

Mike