I have one rainbow baby already

Maricica • Mummy to Ella born sleeping 23/7/17 👼🏻💝 mummy to josh born 19/5/18 💙🌈mummy to maddie born 18/5/20 💖🌈

So we had our rainbow baby boy in 2018 we are known pregnant again is this baby rainbow baby as well or what do I call this baby 🤦🏻‍♀️