Since I was in a somewhat similar situation, let me tell you what happened to me. I applied last year, and didn't get in, and then, I graduated. I decided to take upper level classes this year (400's and up) and have scored well. My DAT's 20/21/22, and my letters of recommendation were all good. I also set myself appart by being as involved in dentistry as possible. This year, I applied semi early and did get into one school ( I was actually going to wait one more year, but just applied to two schools and got into the one I wanted this year). I suggest applying on the first day. Anyway, hopefully this helps.