baby boy not peeing for 2 days .

Hi i am a new mom.Gave birth on 26th may.Baby hasn't been peeing fot the last two days.than yesterday he did once and now again no pee.but he is pooing really well.asked my family and friends even the nurses in hospital. They said as long as he is pooping its fine.but i dont know .any advice on how one can make baby pee naturally or home remedies any mother tried that work before going to the doctor.he is just 4 days old now.