Anyone else going threw this?!?!

Rebecca • Engaged to the ❤️ of my life... Had our sweet baby girl April 20, 2015 😊
My 16 week old baby girl has now decided to start waking up every few hours threw out the night! She use to sleep threw the night no problem. Her sleeping period has all been crazy for the past week. Any other moms going threw this and did your baby go back to her regular sleep schudle??? I'm exhausted again I feel like I have a newborn again!