Monkey is wide awake

I put Charlotte to bed at 7.15 and she seemed really tired. Well she's still awake and talking away to herself. Oh been up to check on her and she was sat up in the cot wide awake! He put her back down but she's still babbling away on the monitor. We are just leaving her as she's not upset but I wish she would fall asleep little bugger. :roll:

She's not had a nap since she woke from her morning one at 12.15. She never normally does this!!!
Do you think it's cos of teething as she's been rubbing round her mouth this afternoon?
?