I feel as if i've lost the ability to think and have no thoughts at all. i have been diagnosed with anxiety and depression. could this be a symptom?

Hyperthyroidism: I feel your distress having the feeling, Your overactive Thyroid is likely the reason for your Anxiety; Fatigue, muscle weakness, weight loss, difficulty sleeping and Changes in menstrual patterns have likely led to “as if I've lost the ability to think and have no thoughts at all” and Depression aided by stress. See an Endocrinolgist for thyroid status. See a Psychiatrist for Therapy, Relaxation