Oscar Test Result - High Risk for Down Syndrome

I took my Oscar Test at KKH today and was told that I am carrying a high risk Trisomy 21 baby, ratio 1:2. I have also been told that the fetus is showing possible deformity for club feet. I have a elder child, daughter who is now 3yo. We've been trying for our second for 2 years and finally conceived and am presently at 13 weeks. I am trying very hard to be calm and rational, and would like to get as much inputs and advice as possible. Has anyone gotten any similar Trisomy ratio result or any advice and experience to share? I am inclined to proceed with the next test (CVS or Amnio). Please share with me your thoughts. ??