My two year old slept fantastically until 8 weeks ago. Now she is waking up every morning between 5.30-6am. Have tried putting her to bed later & cutting down on her nap but nothing works. It's total habit as at the beginning I brought her into our bed & she falls back asleep, but now she cries just to come in. Don't want her to wake my 6 or 4 year old. Any suggestions? We are exhausted!