What comprehensive prenatal test

I’m at my 8th week pregnancy. Doctor was going through prenatal test (Harmony test + sexual defect test) and also option of a more comprehensive test (sorry I wasn’t told the test name) which can detect other chromosome abnormalities (but very rare kind). Doctor did mention that it’s an option to do the comprehensive one and they are very rare like some are 1 in 500k! Since I’m 36 years old this year, (not young lol) I’m quite worried about fetus health. Anyone been through the comprehensive test?