You shouldn’t be committing this far out. Are you eating too fast? Eating too much? Are you dumping by eating too much sugar or high processed white flour foods? Are you drinking while eating? It would be worth seeing your surgeon to discover what’s really going on.
Golden rule is eat your protein first then vegetables if you ate able. Some plans say if you still have room some good multi/whole grain carbs but you likely won’t be able to especially if you are getting in your required protein first. 60g of protein a day is the usual goal. A simple google search will reveal the protein content of any meat, seafood, dairy, etc. Weigh your protein so you know how much you’re getting.
Bread, rice & pasta are usually not allowed on plans because they are nutritionally poor food choices & are too filling. So a muffin would be a poor food choice & the cream cheese would provide very little protein (less than a gram for a tablespoon).
Get in touch with your dietician & ask for some sample menu plans & recommended food lists as well as portion size recommendations,. You may benefit from being given macro & calorie guides as well.
Rate of weight loss is individual. Some lose more quickly, others more slowly. You seem to be doing ok but factors like age, gender, starting weight, weight loss history, etc. all influence your rate of loss. But you’re happy with what you’ve achieved, and you should be, that’s the most important thing. Congrats.