Blood in EBF baby’s diaper TMI baby poop

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Hey all! I have a 5m old EBF baby that’s constantly happy. Doesn’t cry unless tired or hungry. She doesn’t tolerate me eating eggs. I’ve cut most diary, nuts, and seeds. She had a rash around her face and neck about a week ago, and then today she had some bloody mucous in her diaper, this is the most she’s ever had. Do I need to take her to the doctor??