Heart murmur

I am wondering if any one if your children have heart murmur??

Right now, my baby Matt is very sick with bad sore throat again with bad colds. Dr checked on him and told me to send him to heart doctor for children which he said Matt had heart rate high and had heart murmur. Poor Matt, he have been sick all the time. Been sick for 5 days. He's on antibodies right now.

I did went online and do researched. I found and it said when he get sick with fever. He do get heart murmur. Mostly, it's normal?? It would go away?!? And I hope nothing too serious. Dr send him to another doctor quickly which had appt next tuesday. He said he need to be check sooner!