I have read the medical records for my children, but there are some unique circumstances. I work in healthcare and deal with medical terminology/labs/documentation all the time, so much of what I read as normal care can be misinterpreted by people who are unfamiliar with it. Also, my children were adopted, so their medical records were the only way to know what happened at birth, as we were not there.
Your mental health professional should be able to help you decide if this will help you. For me, it was the only way to get information, but I can't say that I would have done it under different circumstances.
Loving life with our very energetic 2 year old b/g twins!