We have a monitor for when Ashley goes into her own room (not sure when that is... what did everyone else do)... and although i can hear her scream throughout the house it is comforting to know she is making little noises in her sleep when she is in there during the day!
i find if bub is sickly and vomiting to place on their side with a antiroll device. i know it isnt sids appropriate to sleep in side but then if she vomits then it will be easier for her to spit up and cry so you hear it. because it is too easy for a baby that is restricted from rolling off his/her back to choke on vomit

so sorry you had this scare! big hugs xx