If im polish is my baby polish?

Yes, ethnically speaking. However, if you were currently in Poland while you gave birth, then your baby is also officially a Polish Citizen and a European Union citizen. If you were in say, Canada, then yes, you're baby is Polish and every bit ethnically Polish (providing your mate is also Polish) as you are, just minus the legality of being a Polish citizen. Your baby is then a Canadian citizen automatically and does not have to apply for citizenship formally.