M son he was born 2.5 months early. He is 3 months old now. He was on breast milk in the beginning with no issues and now he has bloody stool. The doctor tested him for milk and soy allergy and it came back negative. Also he does have a lip tie but dentist said it’s not bad and won’t operate on it. So my doctor has him on hypoallergenic formula but I want him back on breast milk. Any one else have this happen with them?