This kind of staff happens a lot sister, If you stay at hosbital for a day, you can see how many children have some conditions... But we are living in a time that a lot of sicknesses or conditions can be cured easily... The staff of hospital kept my nephew for 3 days at hospital because of something like this but after that he was just okay and he is 6 months old right now :)

So be happy that what doctor said didnt happen and he is there next to you. He will be okay and you should believe that too :)

He looks adorable by the way :)