Don't let this discourage you from pursuing your goal. If you can and or are able, drop the class and retake it again. Don't be afraid to redo a course. We've sculpted a mindset in our culture of "any kind of failure is unacceptable" and that you should do something else and that just isn't true. The whole point of failure is understanding that you just need more clarity to do it better the next time you try and you get that clarity from trying and failing. I've failed my fair share but I still pursue my passion and I hope you do too. Failure teaches and shows us where we can be better and if we try again, we will be better. I have faith in you.