My little girl is 9 months old and we are still using a Snuza alarm on her at night. She had severe laryngomalacia when she was tiny and it terrified me. She seems to have grown out of this now, and I know the alarms aren't recommended once they are moving around, but I'm too scared to stop using it 
About a month ago baby started sleeping flat on her face, much to my horror. The alarm never went off. But for the last week or two, it's gone off most nights. Once I was in her room when it happened, and she definitely hadn't set it off by moving and dislodging it. She was just still, on her tummy. When it goes off it never wakes her, but when I pick her up she groggily wakes and then thinks it's playtime for the next hour or two. She's never a funny colour or takes a big gasp or anything.
I don't know what to think really. I'd understand if she was rolling around and it was coming loose, but that doesn't seem to be the case. She is just flat on her tummy, so why does it suddenly stop detecting her movements? I've got a GP appointment booked but I feel that they're likely to brush it off as the alarm shouldn't really be used now. I'm just so scared that it's actually doing its job and picking up that something isn't right 