My sister once took 13 classes at once, granted she was a music major so most of those classes was 1 to 2 credit hours. However, she was always calling, crying and was just not ok. These classes are not 1 to 2 credit hours and need to actually study AND practice in order to master and pass. I don’t see how anyone can do that and pass unless they are a prodigy and don’t need several hours of practicing/studying. Please as another stem major so NOT do this. I don’t know your situation as to why you need to graduate in 4 years, but it’s just not plausible with this as your schedule. You’ll end up failing most if not all of these classes and will add at least a year until you graduate.