If you posted this post two or three weeks ago, someone might teach you some ways to make up for it. No one can help you if you ask now. The method mentioned upstairs can be used, but it can only be used as an auxiliary means, not as a main means. You still have to study hard.
Here are some review methods for you: It is not difficult to get high marks. It is an excuse to say that I am a liberal arts student with a poor foundation, but I didn't study hard. Go home on vacation and do a set of high math problems. Do the problems first, start with the simplest ones, and do them yourself. Do the simple ones, not the difficult ones. If you can't do it, look at the answer. If you understand, just throw it away and do it again. Finally, the transition to do it yourself without looking at the answer. If you can finish all the simple questions in the book before the start of school, you should be able to pass the make-up exam. It doesn't matter if you can't finish it, at least lay a foundation for your high number next semester.
As for reconstruction, different schools have different approaches. I don't think your question should be a problem. The leaders of your school must have thought of it long ago, and they will arrange it. I don't think you need to run around in two campuses for classes.
And you said the teacher was a little fierce, which is not a problem. No matter how fierce the teacher is, he won't swear when you ask questions, will he? A teacher who is not fierce will be caught if he fails. So this has nothing to do with you, the key is to learn yourself well.
Pay attention to the calculation of limit, derivatives of various functions (including implicit function and parametric equation), indefinite integral and definite integral when doing problems. These are the key points, and these must be learned, otherwise you will fail in the advanced mathematics next semester.