Amniocentesis Testing

I was told I tested positive for Trisomy21, being that I’m only 22 and this is my first baby I’m really scared. I went to a specialist today who did ultrasounds everything looked fine my baby had all its limbs and was super active 🤗❤️ but the doctor said there test are so accurate so to know the baby more than likely has Down syndrome, me and my husband cried and cried and cried.? We decided to do Amniocentesis because my mom was told the same thing when pregnant with me, she did that testing and they were proven wrong, although we well prepare to love our new situation regardless im hoping I have the same case as my mom. Has anybody done the testing? How did it go? Please keep me and your prayers this is really difficult news we’d had got so excited after ttc for 2 years and now we dk how to feel