Blew my November LSAT, not even close to my PT average.

I am so confused.

I had been writing PT's for two weeks prior to the November LSAT and averaging in the 155-157 range. Feeling confident, I took the November LSAT with no issues with anxiety, or time management during the test. Yet, 3 weeks later, I find I have done just as bad as my original diagnostic test...

My Logic games and RC sections were both WAY below average. Does anyone have any tips to improve marks? I feel as if I have been hit by a bus with this mark.