Waiting for the OB to call

This waiting thing is agonising, yesterday got a message that the obstetrician who performed my ultrasound wanted me to call him? he left a number for the practice he was working at today, I called at 9am and again at 11am but he is flat out and I was told by the receptionist he would prob call me around 1 (lunch time). I'm sure everything is OK and it's prob a minor detail but I can't help feeling stressed, that not knowing "what is it" is so hard. I have to leave for work very soon but I need to know before I go, I can't work with the wondering if there is a prob on my mind.


Update....

I finally got in contact with Dr Kasby at 2.45pm, It seems my blood results have put me at a 'higher risk' 1:220 or 0.4% chance of having a baby with an abnormality - based on my age a low risk would be 1:800 or 0.2%. I was offered a few options for further testing to think about over the weekend. I feel concerned and feel confused as to why my results have come back like this as all my other blood tests indicated I'm really healthy. In my initial ultrasound Dr Kasby took measurements and the results were quite good all within normal range. I have done some further reading on the test tonight and feel more positive about my chances of having a healthy baby as 5% of people get a 'higher risk' result and a good percentage of those people end up having a healthy baby, same as for low risk people still can end up having a baby with an abnormality. One of my options for further testing is to go back for another ultrasound when the baby is a bit bigger and Dr Kasby can look for certain things that may further indicate an abnormality, I feel that this is my next best option for the moment as amniocentesis is more invasive (a needle into the uterus to collect amniotic fluid to test cells) so I don't want to go there just yet as I need to do all I can to protect my unborn child which may be perfectly healthy. Dr Kasby is a qualified and experienced Obstetrician so I feel confident in his care.