Shoud I Retake?

So I just finished my OAT and I'm pretty disappointed, It was much tougher than what I expected going into it. I'm wondering if I should retake it or not? I'm trying to apply to Midwestern University in Arizona

I have a 3.92 GPA
Undergraduate Research experience
- Co-author on a paper that got published (don't know if this is worth anything)
Only 20 hours of Shadowing but will get more.



BIO - 330
GChem - 320
Orgo - 330
Phys - 340
Reading - 270....
QR - 340

TS - 340
AA - 320