I'm still a newbie. I'm only 6 weeks post-op. I haven't had any adverse reactions so far, other than my iron and vitamin d being low, but I had that issue before surgery, and nausea; the nausea is new, and it doesn't happen all the time.
My advice to you would be to follow your doctor's plan. Get your protein in. Get your water in. There will be days that you don't want to, but you need to make yourself. You've got this!