On the 5th day of my period I did sonography,and after that doctor told me that the egg is not released. So there is any serious problem? Or that sonography report can show that I have a ovulation problem? My period cycle is normal and regular.Please answer my question as early as possible,then I will be very thankful to you.

I have heard that sometimes an egg is not ready to be fertilized and does not pass. Unless your doc says otherwise just relax :D You are going to be OK.

Your doctor is really the best person to ask about this. We don't know your body, or the results of the tests the doctor has done. Talk to your doctor. That's what you're paying him for.