white dots in mouth of 3w old??

Shiara • Im an 18 year old FTM, engaged to the love of my life, the beautiful man who gave me my perfect little son 😍 15/18/16💙
So my 3 week old had jaundice, but its gone now. He has a really bad cold and has been coughing, but the midwife said his lungs are clear. This is on the top of his mouth, pretty far back.. Help! What is this?? Thrush? Tonsilitis? Thoughts everyones?!