What are the potential causes of a missed menstrual cycle, sudden hair loss, and a previous episode of extremely light bleeding following a recent embryo transfer, high stress, and a new running routine, despite multiple negative home pregnancy tests and normal thyroid function?
Since your pregnancy tests are negative and thyroid function is normal, these changes are likely driven by the combination of high emotional stress and your new running routine. Significant physical and psychological stress can temporarily disrupt your hormone levels, leading to delayed cycles and temporary hair loss, which is a common reaction to stress. The light bleeding may have been related to hormonal fluctuations from the transfer process itself. Please be gentle with yourself, scale back the intense running, and reach out to your fertility specialist to discuss these symptoms and plan your next steps safely.