I was in a similar situation to you, I got a C+ in Gen Chem 2, Gen Physics 2, and Gen Chem Lab! all the rest of the pre-reqs were B+'s! I asked several admission people at various medical schools who said not to worry about it as LONG as there was a upward trend in your grades/GPA! luckily for me that was the case, I got mostly B+'s and A's in all my upper level bio courses during junior and senior year and took a couple of public health courses to broaden my application background!
as long as you have no D's and have a upward trend in your grades you should do fine; those grades didn't help me GPA though and I graduated with a 3.45 and if your grades are anywhere near that, you'll have to do a SMP, like I would have to do in order to be considered for allopathic school!
best of luck to you!