Baby neck thickness

I had Oscar & NIPT test today, after detailed scanning my gynae told me my baby's neck thickness of 4.1 is above average of 2.5 so she advised me to forgo the NIPT test since it only test for down syndrome and to proceed with amnio test instead. Couldn't stop crying as I'm so worried for my baby and decide to follow gynae's advice. The 5 tubes of blood for NIPT have to be discarded. Anyone have done amnio test before? Can advise how it's like? Will it be painful? And how was your test result? #1stimemom #advicepls