It's only been two weeks. While a safe weekly weight loss would be 1-2 pounds per week, there will be weeks you don't lose. there will even be weeks you gain ! And that doesn't mean you're doing anything wrong. Also, the closer a person gets to a healthy weight for their height, the slower their loss is going to be. I know you want to lose 20 more pounds, but if your current height/weight are in a fairly healthy BMI range, you're going to notice your weight loss slow down. Someone who is morbidly obese could lose 1-2 per week. Someone with less to lose will have a slower loss.
So, don't assume something is wrong because you haven't lost in a couple of weeks. Let's put a positive spin on this. In the last two weeks, you haven't gained any weight. That does say you're doing something right. For now, you might want to read some of the spark articles on plateaus.
Mostly, it does sound like you just need to be more patient with your body. www.sparkpeople.com/community/ask_the_expe