I did not have much body hair or facial hair at your age, but it did continue to increase as I aged. Now I have hair growing and covering my back, on my ears, out my nose, and everywhere else. Other than my beard, I would rather not have it.
I suggest you leave the Minoxidil alone. Loose the weight and hit the gym to tone up your muscles. Then you will not want to hide behind a lot of body hair.