azoospermia of testicular failure

Sir my age is 25. Height 5 ft 11 inch. Weight 82 kg. Unmarried.from 2 years I was having problem of numbness and tinging in whole body, bone and muscle pain, muscular weakness in whole body, chest enlargement and belly fat enlargement, frequent urination, high blood pressure 150/100. Many doctors advised me many medicine but no one worked for me. I was also noticing a huge reduction in my testis size. All my test were clear except serum testosterone was low every time i.e 241 ng/dl (in hypogonadal range. All problems are increasing with time. Few days ago I met to an urologist who is M.CH in urology. He understand my problem of low sr testosterone and asked mw to get test done like semen analysis, FSH and LH and ultrasound of scrotum. So I had all my test on 17/7/2017, FSH was 6.26mIU/mL (range 0.67 to 11. 7mIU/mL), LH was 1.29mIU/mL (range 1.9 to 12mIU/mL) and serum testosterone was 249 ng/dl (range 240 to 820), semen analysis shows azoospermia (volume-3.5 ml, sperm - nil, colour - greyish white, viscosity- normal. Then he saw the test and asked me to again do that test for confirm analysis, ultrasound shows left testis volume 8 cc and right 9 cc. So on 24/7/2017 I again had those test report, it shows FSH was 11. 07mIU/mL (reference 0.67 to 11.7),LH was 2.29mIU/mL (reference 1.9 to 12) and serum testosterone was 306 ng/dl. Transrectal ultrasound shows normal study. Prostate size 13. 4 cc.Then doctor take me to checkup room. And see my testis saying that these are small in size but not flabby, he said vas deferens is observable means it is there, epdidimis also there. Then he said he suspect it as case of NON-OBSTRUCTIVE AZOOSPERMIA. Then at last he asked me to get FNAC of testis and said then he will plan further. But I did not get fnac done because I am scared of the pain.sir please tell me the treatment