That is absolutely normal having a rough day. It's like that your body is saying that "I don't want the same energy for today" so it's okay. Just hear your mind that what your body wants.
And if you ask me, I guess my mind and body just don't want to put energy anyware. I've become quite lazy.
Exactly. Not every day needs the same energy. Listening to your mind and body is more important than forcing yourself.