Can you get a tutor to help you catch up? I had a hard time in a class and my teacher had my parents get me a tutor and I didn't want/think I needed one but it was one of the best experiences I've ever had in my life. It was another person, older than I was and more sure and changed my perspective on my life as well as helping me with the course. See if your parents will get you a tutor or counselor to help you work on catching up; maybe you won't have to do the entire year or can figure out a unique alternative that will fit for you and get you back on a track you understand and feel better about than the difficult time you're having now?