My DD is 5 months old (but early so about 3 months corrected). She has up until this week been great at sleeping and going down for naps. But just this week she has started crying when I lay her down and becomes inconsolable. she wakes and cries the minute I leave the room or when she realises I'm not stroking her head. It now takes 45 minutes plus just to get her down and she is so tired- it is awful! It is really stressing me out. She is still good at night- goes down easily at 6pm. Any advice?