I am 18 and am starting to look like my bald father, what do I do?

The degree of thinning that you are experiencing would suggest that you should see a doctor who most likely conduct Bulk Measurements of your hair to determine the degree of the thinning that you are presently having. If the diagnosis is early genetic hair loss, the most common cause of hair loss in young men and you are probably following your father’s balding problem, then the best treatment would be the drug Finasteride, which is highly effective in men of your age, may not only stop the hair loss but possibly reverse it. If you are developing a more advanced balding pattern, the best test to get is the HAIRCHECK instrument test which will determine the Bulk Measurements of your hair.  This will show, over a one-year time frame, how effective the drug therapy will be. Once you know this information, then you and your doctor need to develop a MASTER PLAN which will define what you need.