Regrowth from Telogen Effluvium? How long will it take? (photo)

I would advise see a physician for an in person evaluation. Your photos suggest other diagnoses could be present as well- either with a telogen effluvium or instead.  In order to diagnose hair loss, a careful history of the patient’s heath and hair loss is needed, along with an up close examination of the scalp. For suspected telogen effluvium, blood tests are needed as well. Please see a physician if your concerns persist. If you feel confident you know the trigger, things should be improved in 6-9 months. 

TE reflects the hair cycle which in most women over 60, is relatively shorter than when you were yonger. If it does not reverse in a year, consider a cosmetic solution which is often performed in post menopausal women who have hair loss called Scalp Micropitmentation. Stress can induce genetic hair loss which in women of your age may not be reversable.