Hello Thanks for query .You have not mentioned your sperm count in your query nor posted semen analysis report .. You have been married since 4 years and expecting child however your sperm count is low (Oligospermia) . The other problems like loss of libido and premature ejaculation are mostly due to anxiety . Clomiphene taken once daily for few months does help to increase sperm count .Following measure will help you to boost up your confidence and getting good erection and delay ejaculation and increase sperm count . 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,C,D,E.and Zinc 3)Take anti oxidants like Almonds 5-6 everyday 4) Avoid alcohol and smoking.. Taking Sildenafil (Viagra)as on demand will help to get good hard sustainable erection and to have enjoyable sex. Dr.Patil.