I'm 42 and worried

Hi guys I wander if anyone can help me or erasure me tht everything is gonna be ok, I'm 42 yrs old and I'm having my 5th baby, I am worried and xo Celebes about the scan I have coming up on the 10th January, they are testing for any abnormalities and down syndrome, is there anyone out there that is my age and had this scan done and did everything turn out ok for you x