Most DO schools are now asking for a minimum of 21 for the MCAT. LECOM-Bradenton, for instance, let a person in with a 14 and 17 on their MCAT last year. however, this year, they are making it more stringent and specified that only those with 21 and above can apply. DO schools are getting harder to get in with below a 21 at the very least.
To the OP:
Instead of crying over your MCAT score, suck it up and put every living soul of energy to bringing it up next April. Wait and take time learning the concepts, etc. Practice like crazy and you can bring it up at least to a 24 or 25, which will make you competitive for DO schools. However, if you are dead serious about changing strategy, you may be able to bring it up to a 27-29 and get into an MD school by earning it. I think when people assume because they are a minority, their 19 or 18 on the MCAT is ok, it exemplifies why so many people hate AA. Prove it to yourself and to others, that you are worthy. Give it your all at least one more time. But don't bank on using the URM card as an excuse for a poor MCAT.
I have several URM friends with higher MCAT scores then you, but with one low subscore, and they still didn't get in. Don't assume URM status will carry you that far.
It will only work to a certain extent. They still want people with somewhat decent scores. Ok that's all for now.