Hi, I wondered if anybody uses or has used a cacoonababy? My lo is 3.5 months & sleeps amazingly well in hers throughout the night. I'm noticing though that when I put her down in it her chin seems very close to her chest? I know it's a nest so meant for the baby to be all cosy but is this ok? Lo seems fine but I'm paranoid. It may be that she's outgrowing it & if so I'm worried about transitioning her to a flat mattress.