DD is 15 months and keeps waking up at 5 am slightly on the chilly side. I swapped from a grobag to a duvet about 2 weeks ago because she kept waking up in the wee hours and I thought she may have got herself all twisted and frustrated in her bag. Anyhoo, that all stopped with the duvet but she hasn't learnt how to keep herself covered and was positively freezing this morning. I have put her back in to a grobag tonight, so will see what happens. Has anyone else regressed like this ??