Hey don't be discouraged! I know it's a little depressing and waiting is the worst part, but it'll be alright. There's always next cycle and as long as you keep working on improving, and not giving up on that dream of becoming a dentist, it'll be bound to happen one day. Like people say, there's still hope this cycle but if it doesn't happen, look at it as a blessing for you to spend another year in your 20s living life and another year without 300k+ on your shoulders. Once dental school starts and debt starts to accumulate, it'll be 4 years of schooling and the years that follow is just work work work...
So yeah it sucks if this cycle doesn't work out, but sometimes, even the worst situations in our lives are blessings in disguised.
Don't give up, time goes on and in the end, you'll look back and realize that although your path to dentistry may be different from others and not as easy, it's only because it was crucial to you becoming that much better of a doctor.