If it were me, I'd be keeping him in care, but perhaps adjusting the care arrangement a little. Perhaps you could reduce the hours so he's only going for a morning or an afternoon session...the shorter time will help him understand that mummy's coming back soon. Or withdraw him and then try again in a few weeks time. Also, you might like to shop for a more stable child care centre, one where the carers will be there consistently. He could be perfectly happy in a different environment. I'm a big fan of family day care so I'd urge you to consider this as a possibility as well. Good luck with your decision, and let us know how you get on.