Day three.

Of my LO not sleeping good at night. She goes to sleep at 8 and just last week she would sleep from 8-5 and then from 5-7:30. Now she is awake at 12 and stays awake from 12 till almost 2 nothing I do helps her. Last night I gave her Tylenol but didn't see a difference. I let her fall asleep beside me and usually after about 20 min I can move her to her crib. But last night it was like she wasn't sleeping in a deep sleep at all. She isn't running a fever so I figured it was teething. Is anyone else going through this right now?? Or does anyone have suggestions of getting her to sleep better??