jackie, if you have been called back in six months, they want to keep an eye on you. There can be a number of reasons why a result is abnormal - rest assured that these days, if they had spotted something which needed urgent attention, they would call you back straight away for further investigation. Why don't you make an appointment to go and see your GP or practice nurse, and ask them to talk you through the result? They can explain to you what the lab has reported. You don't want to be worrying yourself over the next six months - they will have a copy of the lab report to go on your records and they will understand the clinical implications. Do go see the doctor or nurse, don't delay, set your mind more at rest by finding out what it means.