F my first quarter

I am taking 3 classes and I am absolutely terrified because I think I’m going to have an F in one of my classes.
Or actually 2. Or all.
I’m taking
Intro to Sociology (have a 66.0)
Intro to Creative Writing (I’m worried because I barely went)
Intro to British Literary Tradition (I have an F currently)

I am literally terrified and I know it is my fault but I don’t think I can make up my grade anymore.
The Brit. Lit class divides everything into 20% and I did terrible on the midterm and my essay so I am not sure what I should do.
For Brit Lit I changed my grading basis to pass or no pass instead of a letter grade.
I heard that if you fail a class you need to retake it next quarter
Is this true?

I am terrified of failing and I don’t know what to do…