How Much Will Child Support Be

Hey everyone im new and soon to be a single mother by the looks of things but im 8 1/2 months pregnant and i just wanted to now when is the best time to file for child support in NYC. Also i found out not to long ago he had a daughter which he saids he pays child support for already, so my question is how much will i get for my child being the second? if my child is the second know what i mean:confused:

Here's information on how child support is calculated in New York