Its okay. You'll be just fine. I scored 96/200 on the BarBri practice exam, but scored 142 raw score. BarBri does a very good job of selecting various types of questions for you to explore. Some of them you will have no idea how to approach. Its a learning process and BarBri does a good job.
Most people score around 100/200 on the MBE portion. If you score between 90-100, you're doing just fine. Below 85, you have to pick up. Above 115, go find a girlfriend you giant nerd!
We're getting some good conversation going regarding a constitutional law exam. Check it out and offer your thoughts. http://barexamproject.com/2010/06/first-essay-review-constitutional-law.html