At this point, I would say that if you haven't received an interview invite you're pretty much done. They'll send a reject letter at the end of the season or just not contact you at all. You can, however, call to ask your status at each school if you haven't done that. At some schools, they do make note of your interest and you have nothing to lose, which might prompt an applicant to call more than once...
In any case, you need to start figuring out a plan for next year if you don't have one. If you're still interested in medicine, you may wish to start researching post-bacc programs or SMPs (or maybe even MPH programs or whatever else you might want to do). As far as I know, these programs finish their application season in June and still accept people right up to the deadline. If you're going to do those, get your application together and out ASAP. . Don't be discouraged. Many accepted students are reapplicants. I've heard that the number is as high as 50%. There are also students who have applied 4 times before getting in.
As far as selecting programs goes, I know that the AAMC website has an incomplete but still helpful list somewhere. Many DO schools also have their own programs. I have no idea which programs are more helpful than others, so you should make note of that as well. This is not the time to dally so if you need something cleared up make a phone call to the program and get the info you need.
Best of luck.