Get me OFF of this plateau!!! :)

Need help getting off this stupid plateau! Am 41, 5'1- and currently at 130 lbs. I started tracking my food with MFP in November 2011,when I was 135. So I've lost 5 lbs slowly but surely, but for the last two months have fluctuated between 129 and 130. I just upped my calorie goal frim 1200 to 1300 based on some other feedback, and am seeing a nutritionist as well. I'd like to get down to 125 to start. Five pounds! Just Five pounds! I do two hard workouts a week- circuit training, and then walk a lot daily. at least six glasses of water, and little else to drink. advice? What am I doing wrong? What should I change? thanks all!