@Artwork94 said:
I stopped worrying about what is out of my control, and I am now focussed on what I can control (how often/how productive my study sessions are)
Yes! And a big part of productivity is adequate rest :D
The December LSAT represents only opportunity, so go for it. Either tell your boss nothing, the truth, or what he needs to hear, depending on the circumstances and his temperament. It's your life, so take control.