Does this happen to anyone else? Alex will be happily lying down having his nappy changed, or be fast asleep in my arms and all of a sudden he starts choking, he goes bright red / purple, completely rigid and really struggles - he can't breathe. I have to force him upright and really smack him on the back several times to get him breathing again. Afterwards he cries for a couple of minutes and is then fine again. It's happened several times in the past few weeks, at first we thought it was because he had cold and blocked up nose, the doctor thought the same, but his cold's cleared now and it's just happened again i've got an emergency appt at the doctors today and am so worried, does anyone else's baby do this?