Hair fall issues. What is the problem.

Hii sir/madam.. My age is 23 and m female. 6 months(march-april) back I stressed for one month bcz of one f my family memebers has died. I had restless days for one month and have no enough sleep also..then my hair started falling out tooo much and waited upto june  for improvement but hair fall didnt controlled. I met doctor and he didnt do any tests gave me  supplements are... Livogen -z tablets Hair kit (fluence )nutrition tablets Oncium 60k weekly once After one month I observed my fall controlling..but after 2 months stopped using oncium tablets ,but from the 4th month my hair started falling as previous again I met doctor and he did some tests are Thyroid ...normal Hemoglobin...13.5 Ferritin...38.5 He said continue the same medicine. But my hair is falling like so. My father requested me to stop that medicine bcz I m spending nearly 2000for month but no use at all and we can't spend more bcz we r from middle class family. So plzzz help me what is the  problem ..