I really like what Dr. Jay Gordon has to say about family beds. you can check it out here.
http://drjaygordon.com/development/ap/sleep.asp
but remember that he still may be adjusting to the new baby. I know when I had my 2nd, my 1st would go through a slight attention craving phase every time there was a new milestone the little would have. and there are several in that 1st year.
she also did very well transitioning to her own bed in her own room, but then realized that the baby was still with us. she couldn't help but feel left out. needless to say, she came back for a while until things settled down. the transition was much easier for her to stick with.
research has shown that when done correctly, bed sharing and attachment parenting can play a big role in your child's physical and emotional development. so kudos to you for the good work you're doing as a mother.