national average is 19AA matriculating (i think) so you are in the ballpark of getting interviews. SDN represents a small % of the real population so don't stress out! SDN can be beneficial to you or detrimental to you depends how you look at things. Schools would pick you over me since I have a 16 RC! I'd give you an interview for sure just hang tight and things will come to you sooner or later.
about your CC classes, make sure that your schools that you applied to is A'OK about CC. I know some schools don't even accept AP credits.