I am 49 male.I have 2 children. Having good relation with spouse.Last year in August all of sudden I felt the cold in AC & shrinkage of Pensis. Since then I consulted 3-4 doctors. My testosterone level was low. Doctor prescribed Multi-vitamin tablets, injection to improve testosterone level.I am in regular contact with Doctors but nothing improved. The pensis is small, non active & hardly erect.Sometimes feeling pain on the top-middle side. After urination the problem increases & at night keep me non-sleep. test of prostate, thyroid & other is normal.Please advise me what is the problem & its diagnose.