I'm 19 years old. My hair started thinning and my scalp is starting show. Also it feels quite damaged. Any suggestion? (photo)

I have uploaded the pictures of my scalp and my temple area. I started having hairloss since 16 but never was it so prominent that I could actualy see my scalp. I have also had lot of stress due to family issues over the past one year . Regarding my family history, none of my family members have baldness. And also I feel quite itchy in my hair most of the time. Also my hair is quite dry and grows very slowly. I want to know what is the problem and also solution for it , if any?