Call every school and ask. I got in last year w/an August 2002 MCAT. I didn't check w/every school b/c I had missed many deadlines.
I believe my MCAT date *just* met the requirements of the 3 schools to which I applied.
If your score wasn't so great, you should probably retake the test. The exam gets harder each year (or that was the case around the time I took it, and I would guess this remains true), and an admissions committee might take that into account if you have a low score.
If you do retake the test, studying for it will get you back into the study swing and help you to review some fundamental bio & physical science principles that you will be happy to solidly understand once you get to med school.