hello user , thanks for contacting health care magic for your health related query . i understand your concerns . you should visit a psychiatrist / sexologist for detailed evaluation and mangement for your complaint- who would like to rule out any physical illness/hormonal/vascualr disturbance through physical examination and investigations like penile doppler study or treat any stress/psychological issue contributory to your problemthrough medications or psychotherapy . it is advisable that you should visit with your partner. Take care