You are suffering from hormonal changes causing Androgenetic alopecia causing hair fall. It's completely stoppable even regrowth of hair is possible with certain medications without any side effects. Treatment depends on the grade of hair loss. So, it's a must for diagnosing which grade, you are in for an effective treatment. Please  send photos of your head, by direct online consultation for accurate diagnosis and proper treatment.

Itchy scalp could Indicate that u could b having a condition called Seborrhoeic Dermatitis. It can also lead to aggravation of the hair loss. Hair line receding is a indicator for the onset of balding which is characterized by the hair thinning out initially then proceeding to hair loss. It's hormonal associated in most of the cases but it could also be genetic or diet associated. There could be multiple reasons for the same. Preferably consult a Dermatologist so ur scalp can be examined and also the hair quality and tone.

Kindly consult online with relevant photographs for proper assessment and treatment