short term disability for maternity

Hello I live in a state where we don't get any paid maternity leave.. so I plan on using my paid time off that I have been saving which is only about 2 weeks and I plan on taking 8 weeks off. I have heard about short term disability for pregnant girls but I am not well imformed at all and have no idea where to start or how it works, so if anyone has any info about it or has used it please let me know! Any info is helpful! Thanks in advanced!