Hello, Welcome to healthcare magic, Receding forehead hair line and the duration of hair fall in your case is very much likely to be male pattern baldness ( Androgenetic alopecia). There are US FDA approved treatments for it like topical minoxidil 5 % solution and Finasteride tablets. You need to take these for a long time as we cannot cure the genetic problem but can halt the process. Kindly consult a dermatologist for initiating the treatment. I recommend you to avoid smoking if you do, treat dandruff if you have it and eat a balanced diet with fresh fruits and vegetables and nuts. Excessive sunlight and pollution can be damaging. Relaxation exercises like yoga helps. Hope this helped, Take care.