So far I've gotten into 2 opt schools and I've taken like 75% of my classes as community college. Before I took the classes, I called the opt schools and they said as long as I did awesome I would be fine. I got mostly A's in all the prereq's. Good luck and make sure you call the schools especially if you have your eye on a specific one.
I took most of my pre-req's at a cc and got into my top choice (suny). Most schools that I interviewed at were more concerned that I did well after transferring to a 4-year university, so don't let your grades drop!