So my baby had liquid in his lungs, Last appointment they said he has a little more. They told me…

So my baby had liquid in his lungs, Last appointment they said he has a little more. They told me not to worry but I can't help it, I'm worrying like crazy. They want to see me in a month to check it out and then they said they'll check about a week after he is born. Has anyone been through this? What will happen if he is born with liquid in his lungs?