I just realised today that Aidyn has gotten his 5th tooth! It popped up next to one of his top ones, which is why I didnt notice as I thought it would be another bottom one next... maybe that explains why he has been waking up heaps as well.
He is going great guns with his backwards crawling today... he does it up on all fours and just keeps going until he accross the room... poor boy though, I think he is trying to go forwards really, LOL!