Talia - I was in your position not too long ago. We were told my baby probably had trisomy 13 or 18 and wouldn't survive. I had already had a miscarriage so was incredibly terrified of it happening again if I had the CVS. In the end we had the CVS as I couldn't handle not knowing and mental health wise I needed to know. We were told a D and C could be done till 14-15 weeks but after that I would have to go through induced labour, so I fet I needed to know earlier than later.
In our case our tests came back all clear and I ha my daughter Ella 4 weeks ago. I was still stressed throughout the whole pregnancy but it did help that some things were crossed off the list.

Big Hugs for you hun xox