paternity test

Jasmine
Okay so my boyfriend/baby daddy is starting to trip about all this. I am 7 weeks today and we got into a big argument and he wants to do a test. I want to do it before my baby comes, like they draw my blood and swab his mouth. But just wondering has any of you ladies done this test? Where would i need to go ask questions about it and how far along do you need to be for the test to be accurate? I want to prove a point and i dont want to wait until my child is here cuz i need his big headed stupid a** now to help with my child. He has a previous child but she did her test once she gave birth. Help!