amniotic fluid paternity test.

So my baby father is still a little nervous and I don't know if he really believe that the baby is his .when I ask him he just said I didn't say that.  I really want him to be more active during my pregnancy and go to more appointment so I was thinking about doing the amniotic fluid paternity test . But I saw online that it's a small chance of miscarriage. I was just wondering if any other single mommy been through this and did that testing .