I am sorry to hear that, I really am. It must be disappointing to hear that you are not doing good.
But on the other hand, I guess the doctor was just calling a spade a spade. He is a medical professional, what is he supposed to tell you? Would he really help you by telling you that you are doing great or even just good if you are not? From what you describe, he was not mean or rude, and I have to admit myself, if I am disappointed, you can see it on my face too - but it also means that he cares. I am only disappointed if something I care about goes wrong - otherwise, whatever...
I remember that my surgeon told me that 6 weeks out, they like to see a result of 25 pounds and up. You are only slightly below that. I am sorry to hear you feel like crap now.
I think there are cases where we need tender loving care and a pat on the back even if we didn't do a good job - but I think in this case, it may actually be a lot better if someone is givin' it to you the way it is so you can realize you have to change SOMETHING.
Does your doctor have a nutritionist? Maybe you should get in contact with her - you mentioned something about that and she said you are doing good. Well, your eating should have changed significantly within the last 2 weeks, did it? You said you didn't have to go through any of the recommended classes where we all learned about the proper eating and nutrition after surgery - maybe you are really not eating right? Maybe you can voluntarily go to those classes. I know if I hadn't gone I would be fairly lost about what to eat and just having a calorie restriction would not work.
Are you getting in 60g of Protein a day? Are you eating all your vitamines (Multis, Bs, Iron and posibly other)? Are you taking your Prilosec? Are you avoiding to drink you calories (aside from a possible low cal/low carb protein shake)? Are you eating foods that "task" your sleeve or are you eating soft slider foods? Are you journaling your food and exercise - you may not even realize that you are off your goals without that? Can you give a detailed list of what you ate yesterday? There are a lot of people who are very knowledgable about foods and nutrition after WLS and I have the feeling that that is exactly where your problem may be...you are eating too much, not enough or the wrong things. Exercise is good, but first and foremost at this stage, proper eating is where weight loss is at.
Chin up, it'll usually get better but please take the time and analyze what you are doing - maybe with the help of this board - and together we can maybe get you on the right track to the magical land of losers!