This is one of those things that's probably nothing, but it scared me, so looking for reassurance.
DD2 was asleep in her cot when I heard her make a sort of choking sound. I couldn't hear that well as I had the TV on but I honestly thought she was struggling to breath. As you can imagine I raced to get her but by the time I got there she was crying normally, and calmed down quickly when I picked her up. Part of me thinks what I heard was just her working herself up to cry, but part of me is thinking what if she really couldn't breath for a moment? SHe didn't have anything near her, no dummy, hadn't been sick.