Sick and the LSAT is in 3 days

So I have a pretty nasty sinus infection/cold. I'm kind of freaking out about how this is going to affect me on test day on Friday since I can't really focus through fatigue and my symptoms. I took the LSAT in September and REALLY didn't get the target score I wanted. I'm planning on submitting my applications in December but if I do as bad on this one too then my plans are kind of messy because I would consider taking the January one but applying in January seems like a bad idea from all that I've seen, so November kind of feels like my last shot. Any thoughts? Please?