Dear Dr. I have got married in Nov. 2008; initially our physical relations were very good. But one day I failed in performance. After some time everything went normal. Again after some time I failed. Now this is increasing day by day. I have got a performance anxiety. As every time I try to get physical, initially everything is normal but suddenly it comes to my mind about the earlier failed attempt. I am feeling helpless. Kindly suggest what to do.

Occasional failures in sexual acts are normal. You have rightly said that you have developed performance anxiety. This is what exactly happens in such type of cases. You need to relax about your performance and spend (or divert) more time in foreplay.