Thanks for your query.Based on the facts that you have posted it appears that you have problem of Erectile Dysfunction
and early ejaculation .In majority of the patients ,in absence of any major health issue cause of erectile Dysfunction id mind related and due to performance anxiety
Following measure will help you to boost up your confidence and getting good erection.and delay ejaculation.
1) Practice regular exercise for 45 minutes followed by meditation
for 1/2 an hour in the morning.
2) Take high protein diet rich in vegetables and fruits and Vitamin A
3)Take anti oxidants like Almonds 5-6 everyday..
4) Avoid alcohol and smoking..
Please consult qualified Urologist
for detail clinical evaluation and further treatment.
There is no reason why you should not impregnate your wife.