Sleepless Nights & New Found Sass

For the last week, Dechlan has stopped sleeping through the night. He wakes up every few hours. He doesn't nap during the day and is so bloody cranky now. It's so frustrating. I'm sick of him yelling and crying about every small thing. I have no clue how to get him to sleep through the night again. I feel so bad for him. He tries so hard to go back to sleep but it takes around a half hour for him to get back to sleep every time.

He's also discovered how to sass and troll people. We're currently into the 'Really?!' phase. He talks back and just overall trolls people. He's so much like his father it's scary. I'm praying his sass dies down a little bit.