Return of fatigue?

Luna • Baby Elle arrived 9/16/15 😍
Since beginning of 2nd trimester my energy has been amazing. I went from needing multiple naps a day (1st Tri) to not need any. But these last two days I'm feeling the fatigue I was having initially in first Tri  ... 😔😔😔 ... Has this happened to anyone else? 💤💤💤