Hi Sir, Welcome to Health Care Magic I can certainly understand your concern and worry about your sexual performance, .I would like to advise you to undergo simple test ie NPT test (nocturnal penile tumescence), in which erections occurs in early morning in the sleep which can rule out any problem with your erection.if it is normal, it is unlikely ttat you have any problem with your erection. , on top of it, it is likely that you are having some apprehension towards sex as you said which could be seen at this age . Being a psychiatrist , I can advise you some simple tips like....Be relaxed before sex, spend time with foreplay which stimulates the production of nitric oxide NO, to sustain your erection for long time ....And you can start some antianxiety drugs like SSRI s ie escitalopram which helps in reducing your anxiety and worry, avoid alcohol and smoking if any, maintain adequate weight, try to engage yourself in some physical activity like exercises which helps in production of BDNF ie brain derived neurotropic factor, that keeps you active and stress free through out the day. If these measures does not work,its better to try with viagra ie sildenafil. the dosage is 25 mg once a day, one hour before sexual activity . finally, there are other options like penile implants , which is an OP procedure , takes about an hour, vaccum constriction devices, pump with a band on it. The ultimate option is vascular reconstructive surgery . You can consult your psychiatrist for further information. Post your further questions if any, I will available to take up your follow up questions Thank you