It’s not “classes” its “credit hours” At my college 12 credit hours is the minimum course load to be considered a fulltime student.
That could be as little as 3 classes, if they are all 4 credits (which lab sciences usually are). A typical courseload is around 14-15 credit hours (at my collge, if you alternated 14 & 15 credit hour semesters, you would have exactly the credits needed to graduate, of course it never actually worked out this perfectly). That’s usually 4-5 classes a smester, depending on credit hour distribution.
Like I might have 3 3-credit classes, 1 4-credit class, and a 1-credit “gym” class (I took horseback riding). That’s 14 credits, and the 1-credit isn’t really a class, it’s just fun for credit.
If you are in a major, there may be some prevailing wisdom about what classes should not be combined with others because the workload is too high. My Fundamentals of Design class was a 40-hour workweek all on its own, and anyone in the major would tell you to take a minimum schedule alongside that class.
You would never need to take 6 or 7 classes in a semester (21 credits!?) unless you planned to graduate early with 2 majors, or needed to retake required classes that you failed. Don’t you have academic advising to explain your graduation requirements?
My college has a dual curriculum (sp?), secular and Judaic. In grade school and high school, it means you start the day earlier and end later then the public schools do. In college, it means you take more courses.
This may not be the advice you want to hear, but it might be the best advice you’ll get. I worked for a director of counseling in a very high stress college for years and she would, if appropriate, give this advice and people would just think she was the worst, meanest lady there was. They would say, “Oh that lady So-and-so thinks I should just quit,” when she was really telling them that they should consider that this particular thing is, as elbows said, maybe is just not for you. I don’t know what your major is, but let’s say it’s architecture. Well, maybe you’re not an architect at heart; you’re a film maker or graphic designer. And what’s driving you to finish this particular journey? Give yourself permission to re-examine what you need to do to find your joy.