You're in your FIFTH year and working hard to get grades of Cs and Bs? Why are you pushing yourself so hard in a career field that causes you more stress than happiness? Even if you get through college, you will end miserable in a job you truly hate.
Go to your college's counseling center and talk to a counselor to help you discover where your true, natural abilities lie as well as your real interests. Some, if not all, of your courses are likely transferable to a new college major more suitable to your
abilities and interests.
There is an absolute truth to the saying..."Do what you love and the money will follow."