Adjustment of Status - I-485

Hello guys,i wanna share my expérience on the forum to see if some one can Help me understand was going on with my case.My wife married on May2013 and our priority date is June13 2015.After réceving my EAD Card on August24,they send me interview mail for November3.We Been to the interview and After couple minute on the waiting Room the IO called us to Her office then she swear us and ask for both ID.After that she start the yes and no question,how we meet,who the proposal blabla then she séparate us By sending me back to the waiting room.I was expecting Her to call me back in but she didn't...After less than 15 minute,she come back with my wife and give us a printout wish saying that my cause is under review and she do not need more évidence from us if they do,they Will let me know By Mail.3weeks allready and we haven't heard anything from them.my file office is Chicago and my wife is a little bit older than me.is that normal?What i should do?