Help!! My son has always been a good sleeper going to bed at 6:30pm and sleeping til 6:30/6:45 am! Since having a tummy bug 4 weeks ago he has woken like clockwork at 5:30 every morning! He still has 1 nap a day but this hasn't got longer since the early wake ups?? He's having only 10 1/2 hours sleep a night!! He is 20 months old - any help greatly appreciated