Don’t be afraid to ask for an extension for an exam or for assignments.
I got this tip from a professor long ago. Professors can be very understanding. You can explain to them what is going on in your life or what has been confusing in the chapter. Sometimes, they can give you an extension. I have always gotten an extension when I have asked for one. Even, professors have offered one because they can see when I am struggling.
So don’t be shy! Ask for that extension!