Hello, for the last week I have been giving my daughter children s dose of melatonin to get her on a decent sleep schedule because she has a very hard time falling asleep. She has had a heart murmur ever since she was in my tummy, she is three years old and her doctor today is sending us to a cardiologist to have her heart checked because the murmur has not gone away, should I be worried? Is this common? Her pediatrician said that it was ok to try out the children s melatonin tonget her on a better cycle of sleep and as I am reading I am noticing more posts about it causing other issues, can you help kenoit with this? Thank you A