I am trying not o worry but I received a C for the whole year of physics. These are the only c's on my transcript but I honestly tried my best. I went to tutuors and I did my homework and reading. I understood the concepts butI could not get the problems. That side of my brain appeared to be in sleep mode. I am just worried about my admittance
IF it makes you feel any better, I got a C- in orgo II (I didn't attend a single class except for tests b/c I HATED the prof -- dumb -- attendance counted toward our grade!) and a D in anatomy (I missed the first 3 weeks due to a surgery) and I'm a PGY-I now. I did take an advanced organic class and got an A just to prove I could do the work, and just admitted my stupidity for the anatomy class. I ended up missing barely missing honors in med school anatomy.
This is just to let you know that they do look at the overall picture, and post-bacc grades do count. Don't let one C keep you from applying. What do you have to lose except some $$$?