My DS is just 6 months old. Until this week he has been fantastic at night going to bed at 7 falling straight asleep, I dream feed at 11 and he sleeps through to about 8am....a dream! The other night he wasn't well. Not sure exactly what was up with him but he had a slight temp and from 10 - 5:30am he was waking every 20 mins crying hysterically. He's fine now (may have been teeth?) but since then he has started waking at around 9pm and not settling for at least an hour before going to sleep for the night. I don't get it and don't know what to do about it! Help!