Musical Sleeping Patterns

Ollie can't seem to figure out his sleeping pattern. It changes every night. We think he is now starting to get his first tooth. He chews on our shoulder when we try to put him to sleep. Makes for a soggy shirt when he's done. Last night he was up until 9pm. The previous 7:30. What a strange boy. If it is teeth, nothing will be on a schedule for awhile and we'll have an unhappy, in-pain baby for awhile.