Hi myezzence, well - your 3rd week stall sounds like it could be right around the corner, if you should get this. First thing to do is not panic! Don't worry, if you keep staying on course your weight will eventually pick back up. That said, it sounds like you are really doing amazing things with your weight loss already -- CONGRATULATIONS!!!!
As far as your eating is concerned, I also had a hard time acclimating my new sleeve over into mushies and solids when my plan called for it. What I did in the beginning was just chose one meal per day to eat as a mushy or a solid (when you get there). Not everything agrees with our sleeves so the main concern should be to eat very very slowly, take tiny bites and even wait a few minutes between each bite. Especially after the first one to see if your sleeve takes to it or not. If you feel nauseated or uncomfortable in any way, don't force it, stop immediately. Then at that point, put that new food on the shelf for a month and go back to see if you can tolerate it at a later time.
Don't worry if you can't get all your foods in, some of us just take a little bit longer.
Protein Drinks or supplements can be tricky for a lot of folks. I've liked Isopure in the past but it can have a very strong taste. In the beginning your main intake should be fluids. If you can't meet all your protein needs in the first month do not worry. You are pretty much in line with most others. Definitely do your best to get all or most of your Water in though! My suggestion would be to maybe water down the Isopure so the flavor isn't too demanding. Also, special K makes a nice Protein Drink that isn't as strong as Isopure. It does only have 5g per serving but as I always tell others, some protein is better than no protein. Try watering down all your protein drinks. Again, even getting a little bit is better than getting none.
Try www.vitalady.com - she will send you single servings of many different and popular protein choices. They are all very good and high quality. I do suggest the Syntrax nectars. They are very good, but again those do only have 6g of protein, so if you're trying to get more you might want to make other choices right now.
I hope this helps!!