I would definitely have a back up plan. It wouldn't hurt, and it will give you some peace of mind. In case I didn't get into the ADN program at Chaffey, I took Biochem (chem 12) so that I could apply...
I was in your shoes a few months ago. I was positive, but still tried to prepare myself in case I was denied into the program. I applied Spring (April) 2011 and got accepted. It was my first time...