Fatigue used to cause me great anxiety and my medical practitioner recommended kava. This really helps. It's so effective it even helps schizophrenia.
I recommend you take Yogi Brand tea called STRESS RELIEF
The dosage is 2 tea bags fully steeped for 20 minutes covered. This brings quick relief in about 30 minutes after drinking. This dosage should be on the packaging.
Or before bed you could try Gaia Herbs Sound Sleep.