all the newfound energy I was promised into my second trimester has NOT been evident these last few…

all the newfound energy I was promised into my second trimester has NOT been evident these last few days! I have woken up around 8 to see my husband off to work and then try staying awake but can't! I have been up, moving around, trying to accomplish things but I am BEAT! I have had a four or five hours nap the passed two days and then go to bed at 10! where is my ENERGY!