Oh God! Race Time

Ok, the marathon is only 4 days away... I'm very apprehensive!  I know my rep as a sandbagger, but this time I'm sincere: I'm going to fail!  This has been my worst marathon training EVER! Last year wasn't great, but I ran all of my training runs as a substantially faster pace. This year, every training run has been a slow slog. I fear this will be my slowest marathon ever. Also, the memories of last year and the pain in those last 6 miles is still in my head!