Everything you're feeling is completely normal.
The first couple of months pretty much suck. You just had major surgery, you're sore, tired, hungry, trying to figure out the whole eating thing mentally and socially. And yes, I think all of our expectations about surgery were pretty much wonky. We hear about these massive weight loss numbers, and for some reason think we are going to be at goal and living happily ever after in 6 months. That's far from realistic for most of us.
The 3rd week stall is a completely normal thing that happens to 99% of WLS patients. And besides, weight loss isn't linear. If you look at it on a chart, it looks more like step on stairs than a straight line downward. We stall, go up, go down, and sometimes back up again. Then we have a whoosh, and boom...down 5 pounds. It's really strange!
Take it from someone who is almost 4 years out...it gets better. Once you get into more normalcy and into a groove, you'll start feeling better about your new lifestyle. I feel completely normal other than I get full faster than other folks. And it's not even as fast as it used to be anymore, unfortunately. Don't stress, and just go with the flow. Take this time to learn all you can about health and nutrition in order to be as successful as possible losing--and more importantly---keeping the weight off. I won't even go into what a complete pain in the ass that is!
Hang in there. I promise it will get better.