It is a good idea to have your scalp examined by a physician who can evaluate the reason for your hairloss. If it is due to AGA Male Pattern Baldness I would recommend you discuss the use of oral finasteride and topical minoxidil with your doctor.
Once you confirm your diagnosis of genetic male hair loss from a doctor, then you should as soon as possible start a program of Finasteride, Minoxidil, Low level laser, or any combination of them. Be sure to document your progress to help you make future decisions. Must not have a hair transplant at this point
Early onset Male hair loss
Thanks for taking the time to write! It is tough to deal with hair loss at your young age, but, thankfully, there are many options for you. The first step is to get an accurate diagnosis. You may have genetic male pattern hair loss (androgenetic alopecia) even if your parents did not show it. See a doctor who specializes in hair loss, and can rule out any other causes for your hair loss.
Next, if it IS male pattern hair loss - start on treatment with finasteride (Propecia), minoxidil (Rogaine), low-level laser therapy (like Theradome or similar), and a shampoo like ketoconazole (like Nizoral) or zinc shampoo (like Head and Shoulders). These treatments ALL work better the earlier you start.