Is there anyway to fix my grades in 21 days? PLEASE HELP!?

OH MY GOD. There's 21 school days left and I'm FREAKING OUT. Because right now I have a 65% in both English and French and I'm SUPER nervous. As in some of my hair was falling out (no joke) and I've been working my butt off. French is getting extremely difficult because our French teacher is teaching us about verbs. He doesn't stay on topic with us about verbs, he keeps moving from talking about verbs to learning about clothes and having to jot down all that stuff. I always get 100% in his class, but the ways he's teaching it now is really hard to follow him. He's also the most boring lecturer you could have with the whole soft spoken tone and stuttering. I'm learning to cope with this but it's driving me insane because then there's English. Our english teacher has high expectations. She pressures us with assignments and she likes to criticize and point out every single flaw in everything we do and I am not kidding. She grades like nuts (college wise) and also doesn't stay on topic with teaching us. One day all we learn about is forming sentences, next we write down character traits, then we're reading, doing some random project, and OH MY GOD! Please help me, I'm doing my all this whole rest of the month and it's been paying off in my other classes except those two. I do not want to take summer school and I definately don't want to get heldback. The thought of it even scares me. What should I do?! HELP! D: