Apnea?

So I've caught Ellie snoring a few times which causes me concern since often PRS babies develop sleep apnea after their palate repair surgery. Its not very frequent but her sleeping has changed. On the other hand, she is getting older so it could be coincidental. She does seem to have more food coming out her nose than before, but that could be because she hasn't learned to work her tongue/mouth/nasal passages yet. I really hope we don't need a sleep study because its my understanding they are virtually useless and generally a pain.