Erctile dysfunction. Doctor nearest me.

I 24y.unmarried.regular masturbate from 16.5.y.last 8 month I notice the problem of ed.then I start home remidies.stop masturbate, regular exercise.msg with oil.after 7 days I got full erection.but a fear come to me.after some day I got erect but fail to maintain.then I go to a registerd doctor.he test the report free testosteron, prolactin.DHEA.report mormal.he gave me aurvedic med.cost of 4600/m for 4 month.from 1st day of taking medicine I got full and long erection.then I feel recoverd from it.after stopping medicine I got hard and sustain erection only 20 day.then i get erect by hand but after 8 to 10 second I loose erection.after some days I went to him.he prescribed 2 month medicine.(though he said I recorved within 4 M.).now I taking his medicine.getting ful erection.now doctor please tell my actual problem. what should I do go to him or search a new doctor.doctor please suggest me or recoment a doctor nearest me.I don't want medicine from online.