My 6mo has been a really good sleeper since we put him in his cot at about 10 weeks. He'd wake in the night for a feed, be asleep by the end, I'd stick him in his cot and leave him. There would be the odd ocassion where he wasn't asleep / tired after his feed. Also, when he learned to roll a coule of months ago he'd do that in his sleep & wake himself up but he grew out of that.
For about a week this has all changed. He's still asleep at the end of his feeds, but when i put him in his cot he fidgets, rolls and wakes up. I rock or pat him back to sleep but as soon as it stops he fidgets again. This is also happening during the day and he's exhausted. Does anyone have any ideas why this might be happening? Noise / light levels haven't changed significantly.