That's it really - ds2 (4 months)from being absolutely fine was suddenly HUGELY sick whilst in the baby sling with dh (he'd put him facing forwards which I think retrospectively was a mistake ), then went totally white and floppy and really really cold. Phoned NHS direct, they sent ambulance, went down to Childrens Hospital A&E, in the ambulance of course ds2 was grinning away, still a bit pale. They checked all his obs, was fine, waited 4 hours to see doctor(!), he was absolutely fine, got home 2.00 this morning. Got to bed at 2.45, and had to get up at 7 this morning.
Anyway, thank goodness he's fine, no idea what caused it - any ideas?