What Is The Treatment For Hair Loss?

Hello, I'm Gaurav from New Delhi, age 29 years. Of late, I have noticed receding hariline with loss of hairs on both sides of frontal-parietal region of head, giving an "M-shaped" appearance. I'm really concered about this and it's degrading my self-esteem and confidence as I'm single yet and in a serious relationship. In the past, I have been on the regimen of antidepressants for the treatment of OCD but it's been more than 5-6 months since I'm off of those medications. Please advise me any non-invasive regimen or recommend me suitable specialty of medicine that I must follow to get over the problem of hair loss. Thanks in advance.