Thanks for posting the qwery.
This hair loss can be alopecia areata
which is of unknown origin and aggravated due to stress
Dermatological evaluation is mandatory and also hypertension
or high blood pressure
should be ruled out as hypertension may be the cause for headache and aggravation of this kind of alopecia or hair loss.
Proper blood investigations and physical examination is required for proper diagnosis and treatment.
Hope for speedy recovery.