I wouldn't say you're "fully screwed" -- at least not irreparably -- but you're pretty screwed. Chances are good you'll be looking at DO, in which case you should retake all of those classes as it will get those Cs replaced. Also, since Gen Bio and Gen Chem are the two most critical subjects on the MCAT and English is probably 3rd (considering its importance to VR, whereas Physics and OChem are both really kind of lesser topics on their respective sections per recent trends), weak performance there is likely to haunt you long-term.
So basically...yes, retake them. And don't let any of this happen again. Ever.