My Young Adult Daughter Complains Of Being Chronically Fatigued. She

My young adult daughter complains of being chronically fatigued. She works part time, is a college student, and is in a great relationship. The problem is, she cycles between happy, flat affect and weepy depression monthly along with her menstral cycle. Her dr has tried antidepressants, birth control pills, along with meds for Adhd with which she also struggles. Can you suggest something? What type of Dr should she see?
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