I have a milk intolerance and an allergy to soy bean. I want to make sure this surgery goes without any glitch because I cannot hear that "I told you so" from my husband. They suggested the Unjury Whey protein but after taking it for about 5 days, I'm experiencing abdominal discomfort, headaches...I am afraid to rely upon it for the pre and post surgical nutrition. I cannot tolerate soybean protein at all. Are there any recommendations for me from experienced surgical patients? I was amazed when I was told my the medical office to contact this block for suggestions...AND disappointed that the medical office seemed reluctant to do this research for me. Give me what you know!