My baby girl is 27 days. Passing sometimes blood strings in stool from past 4 days. She is totally breastfeeding. And is feeding and sleeping well. But often straining while sleeping. My dr suspected cow milk allergy. So i stopped dairy from 3 days. But no improvement. Also she is taking vit d. And duralac and zinc powder syrup. Kindly suggest what else could be the cause. I am attaching the images.