I was in the same exact situation you were in. I studied what it seem to be everyday in the summer and then try to study during the school year throughout the use of the Kaplin book. My scores were 280 AA/ 280 TS. I was pretty devastated. I just wanted to quit and give up completely. However I decided at that moment I wanted to be an optometrist and I wasn't going to let a test stop me from that. You can either decided now to continue after your dream or take another path. Either way be happy and confident with your decision and make sure you talk to an adviser or some sort of career professional about it. But here is what I did and my suggestions. I am by no means a perfect example, but I hope it will help you and other people reading this.
Here is what I did. My plan that at the point of receiving my results I was going to take a year off and apply for the next cycle. I am so happy I did. I was able to focus on my classes for senior year and take some more leadership roles in clubs that I probably wouldn't have if I was studying for the OAT. I also took some harder sciences courses that would look good to an admission staff like Immunology, Advance Physiology, and dida research project on rhodopsin receptors. I really tried to do really well in those courses to show I wasn't taking it easy my senior. After I graduated, I started studying for the OAT again and applying to schools through OptomCAS on July 1st. I wanted to make sure I was as early as possible so that would increase my chances if something went wrong with the OAT. I used Chad video's (coursesaver.com) this time around from studying as well as various practice tests including OAT Destroyer. Chad videos tell you exactly what you need to know for that OAT and tricks on how to remember material. It is easy to get lost in the information with the Kaplin books and the chad video's help you get stay on track and gives you quizzes to practice the information you just learned. The OAT Destroyer I just bought for sections I did really poorly on and practiced with those. That really helped with timing and was set up just like when you take the OAT. I was shooting for a 300 AA/ 300 TS because I hoped that would help me at least get an interview at a school. When I took it at the end of July, I ended up with a 310 AA/310TS! I am a terrible test taker and those scores seemed impossible to get, but I did it! I highly if anything to study with the coursesaver.com Chad videos because I really owe all of that hard work and studying to that. I did finish my application shortly after that and ended up with interviews at all of the schools I applied to (including Salus!). I have decided to go to IUSO for Fall 2016 though, but I so happy that I took a year off because I do not know if I could have accomplished all of this without it.
However if you don't want to take a year off, this is what I suggest. I would sign up to take the OAT again today. Schedule it as close to the 90 day mark as you can, maybe sometime in December/early January before classes would be good because you will have a break and can concentrating on the OAT. The second is to get OptomCAS application done as soon as possible. There are a lot of tedious things to fill out and the sooner you get it out of the way the better you will be in the end. I would even go as far to explain your situation about the OAT in your personal statement and how overcoming the obstacle will help you become a better clinician. Personally I would get the tests in before you take the OAT again so that you at least have your name out there and your file can be reviewed. Just let the schools know that you are retaking the OAT. Study as much as you can for the OAT through coursesaver.com and your Kaplin notes. Create a schedule and stick to it. You don't have to make it all day thing. Even at least an hour a day of studying is good in my opinion. Just try to get through all the videos and have time to practice the material before you retake the OAT. Once you do super amazingly well on the OAT, you will be all done if you have already turned in your application! If you do wait to turn in the application until you get results, you can either of course one turn in the application ASAP. Or if you are still unhappy with the scores, I would really suggest taking a year off. You can build up your application in other ways through more shadowing hour, volunteering and other experiences to make you a more well rounded applicant. You will also have more free time to take the OAT one last time and really concentrate on doing well!
Whatever you do, I hope you don't give up now. This is just a small bump in the road that with enough will power you can overcome. Feel free to message me with any questions you may have! I wish you the best.