I really think you'll be fine. Look on the bright side, you have 2 weeks to learn from your mistakes. The same thing happened to me when I started doing the achiever tests one week prior to taking the cDAT. I found myself getting 15s and 16s but it really stressed me out but I guess the stress was good because it motivated me to try to understand why I was getting them wrong. This paid off because when I took the cDAT I ended up with 21 in bio and 23 in genchem.