Consider pushing your test back if you're truly not ready. As someone who needed to re-take, trust me when I say it really sucks retaking and it will run into your school year, which is something to take into account (assuming you're still completing undergrad). Also, you gotta look at where you're currently at and ask yourself if you've truly exhausted every avenue that you possibly can to prepare for this current DAT. If the answer is yes, then another prep period may not make a difference for you (statistically, most that re-take do not actually improve their score according to the ADEA). To answer your question, I would consider pushing back before conceding to a retake, because you'd be very late in this cycle and paying and also, an extra 450$ for a retake is no fun lol. Good luck!