At age 41 I had a DS risk of 1/37. Mine was due to a bad NT measurement, my bloods were normal. An amnio was recommended to me so that's what I had. The hardest part about the whole process is waiting for the results. I recommend you keep yourself busy for the waiting time so that you have less time to think about it all. My amnio showed no abnormalities & sure enough that was the case when my son was born. Try to keep as positive as you can for now. There is no point thinking the worst, when it just may not be the case. I wish the best of luck for your CVS & also for the wait for the results.