I just found out my baby has a genetic heart defect where one of his ventricles is to small im scared!?

they did a chromosome test to make sure baby was normal and the results came back normal but from this point on i do not know what will happen with the heart problem once hes born ,i am told i need to have him in Riley hospital and hope everything will go well once hes born. i am just confused on the whole situation and scared and i just need advice from a mother or someone that has went through this before.