You are married 9 months ago , and if you had satisfactory erection during first few months then one or more of following may be a possible cause .
1) Trauma to penis or testis -- consult Urologist
2) Increase addictions ( Tobacco smoking , Alcohol Other Drugs etc ) ----- Consult Psychiatrist
3) taking medicines for other disorders ( High BP
etc ) -- consult Physician / Psychiatrist
4) Disturbed relations with wife or family members or others ------ consult Psychiatrist
5) depressed mood , feeling anxiety
, other mental problems ---- consult Psychiatrist
6) Nutritional deficiencies , fatigue
--- consult Physician / Psychiatrist
Take treatment as early as possible as sexual dysfunction
can cause mental and family disturbance .