Down syndrome testing

Tamara
Has anyone done the blood work and test of checking your baby for possible Down syndrome? My Dr has me scheduled to get it done I'm in second trimester, however I'm scared because I've been told that there's risks of poking the belly to get fluid from the placenta and a friend of mine lost her baby due to it? If anyone can please put me at ease or if you know anything of this that could help me out in any way please do ❤️