DS is 2.4 years old and has always been a good sleeper. Even though it is really dark in the mornings, recently he has been randomly waking up v early (before 6am) and despite all efforts of bargaining/explaining too early etc, he will not go back to sleep, screaming and hollering (normally not in the best mood). Seems to have coincided with him having fewer and fewer daytime sleeps (one a week currently). I know I am very lucky as he has always slept well but this is driving me nuts - is it just a phase? TIA