Alright guys, I really need your advice...

I just took a TPR Course Test 3 and scored 123/126/126/126. I have done absolutely zero content review for Chem/Phys and for Psych/Soc. I still have a few chapters left of bio. I'm supposed to test Aug 24 and I'm majorly worried that I won't be able to reach my goals of 510+. I'm considering pushing back til January (I'd continue with anki and pratice/ practice tests during the semester). I'd finish up content review through the month of August. I had planned on using August for AAMC materials. I really wanted to get the MCAT out of the way so that it wasn't looming over my head during my senior year. What do you guys think?

My score is really important because of a slightly below average GPA due to a tremendously bad freshman year about 8 years ago.