Frequent night waking with daytime fatigue usually points to a disrupted sleep cycle, not a separate illness. That fits with the anxiety and stress you describe, since the two feed into each other. Magnesium glycinate and ashwagandha are both commonly used for sleep and stress. The right brand and dose depend on your weight and anything else you take, so that call is best left to your therapist or physician.
Next Steps
Ask your therapist to confirm the dose and whether to start magnesium and ashwagandha together or one first. Keep a fixed wake-up time and cut caffeine after early afternoon to help reset your schedule.
Health Tips
If concentration and motivation keep dropping despite better sleep, or anxiety feels unmanageable, please see a physician or psychiatrist for a full evaluation.