Article continues below advertisementAlyssa Milano has spent much of her life in the public eye, but few knew she struggled with panic attacks for years. Her anxiety, diagnosed in her 20s, only intensified during perimenopause - the transitional stage leading up to menopause that affects millions of women.Article continues below advertisementNew DocuseriesSource: megaAlyssa Milano appeared in 'Balance: A Perimenopause Journey' as executive producer and shared her own health experiences.