Generally, your practice scores will be a major predictor in how well you did on the real deal. If you study much harder there is a chance you will do better. However, you should go ahead and try to apply this year regardless. If it makes you feel better, I had one friend whom took the MCAT 3 times, getting a 25, with a 5 in verbal, each time he took it. He ended with 2 MD interviews out of 25 schools he applied to. Another friend had a 26, and yet a couple others had 27. All of them made it into med school. Of the two whom had 27, one of those two people took it 3 times, with a 24 the first time he took it as well.
Also, another friend took it the first time and had a 22 without much studying. The next time she took it, she got a 28. So you see, it is possible to get in. And it is even more possible to improve your score.
Also, there are DO schools. For a DO school, you would be highly competitive. So don't stress. just focus this summer and study hard and take a lot of practice tests.