I agree with all the posts up here. WHATEVER you do, don't trust counselors... I've talked to many who seemed to have their heads lodged up... well you know where. They really mean to help, but you know yourself best. I was given lots of bad info when I started UCSD, and either found out things on my own, or the hard way. Check things out for yourself... I can't emphasize this enough.
Also, I don't think going to a community college will hurt you in the slightest. As others have said, it will only stand to boost your GPA since the level of competition is much less. HOWEVER, I agree with brhill.... you have to be careful when you actually do transfer that you work your tail off. If your grades drop significantly, and it's a recurring trend (ie. past the point of the adjustment time it takes to get used to UCLA), adcoms will wonder whether you have what it takes to hack med school. Don't freak out about this, just work extra hard early on at UCLA when you transfer to ensure you're grades don't slip too much (hopefully not at all). Know what's expected of you... good luck!