Genetic Testing

I have just recently found out I'm pregnant, and last yr my partner and I had to have genetic testing as a member of his family has a genetic disorder. My partner tested positive to the gene and I'm negative so we have a 1 in 2035 chance of the baby have this genetic disorder. My doctor asked me today did we want further testing for this and I just don't know what to do, as the testing is very invasive and can only be done by removing fluid and testing that way, they have explained it could potentially caused a miscarriage but I just don't know what to do if we don't have the test. What are your thoughts? The result could potentially change the final outcome so it's so hard to know what to do.