Peanut butter
I just looked on my surgeon's do's and don'ts list and it clearly lists chocolate milk as a no-no! It sounds like it could be a combination of the sugars in all of the ingredients that you used. At 11 days out I used Chocolate Unjury with 2 tablespoons of PB2 powder for a chocolaty peanut buttery flavor. To that you can also add a couple of squirts of DaVinci S/F caramel for a Snickers type of a flavor. You can use many different things for flavorings. If your chocolate protein powder isn't chocolaty enough for you try adding either some DaVinci S/F chocolate or some S/F Jello Chocolate pudding. I know I wasn't allowed to add fruit or melon to my protein drinks until I was on the soft stage. So that was 3 weeks out for me.
Check the sugar content in the peanut butter and also the Oil/fat content. We can't usually handle that early out - try an organic peanut butter that has no oil or sugar - Jiff or Skippy has one that's oil free and no sugar. And peanut butter is a great go to food later on (a teaspoon of it) when we need a bit of protein.
Jen 12 yrs post op RNY
Natural peanut butter isn't as bad as the regular ones, but it has a lot of fat. I want to try the PB2 stuff. They had it at the grocery store a while back, but I guess it wasn't selling. I may need to order some!
My journey: http://avabyrd.wordpress.com/
Definitely talk with your team to see what they recommend having or not having. Personal note, I received tons of advice along the way that PB was good thing (I do not agree mostly). I do believe even my nutritionist said so in combination with other things. Not until much later in my post op phase though. The big issue I have observed with myself and others is a teaspoon or tablespoon is not very much and difficult to measure by just spooning it out. I consider this to be a danger food for me that I can abuse very easily. While losing I try to avoid it.