How can you tell if your diet is harming your baby? Is your baby just fussing around or is something truly bothering her? I lost count of all the sleepless nights I had when my son was younger. I wasn’t able to determine what was bothering him and allergies were the last thing on my mind. I thought it was normal for babies to fuss around and have a rash here and there. A friend of mine suggested that I switch my diet. I was breast feeding at the time and didn’t think that my diet would affect my son. To my surprise it did. All of the dairy products I was consuming were harming him. He was congested, restless and sometimes had diarrhea. By adjusting to an almost vegan diet I saw a tremendous change. Although it is normal for most babies to fuss around and wake up in the middle of the night. What you can do is pay close attention to your baby after she is breast fed.