Failing a nursing class

Right now I'm a junior in my med surg rotations and I'm failing miserably. I currently have less than a 40% in the course and I need at least a 70% to pass. We have less than three weeks left in this course and even if I were to do well on future assignments my grade is still not budging past 70 due to me procrastinating and turning in a few assignments very late, and also not always comprehending what is required of me. I acknowledge that this is nothing but my fault and I'm taking steps towards managing my time more effectively. I'm extremely angry with myself and I don't know where my future is headed at this point. Even if I were to retake, I will not be dropped out the program (I think?) but my graduation may be delayed a year which is what I'm trying to avoid. Also another thing with me is that I lack confidence and communicating with my patients makes me very nervous. Sometimes I even wonder if nursing is even for me when I don't even have the main requirement which is proper communication. It'll take a miracle for things to work in my favor but the main thing I want to work on is my communication. I know its a silly question to ask but how do you exude confidence and effective communication with your patients even if you don't have it? I always have a flurry of ideas  that I want to say in my head but then I start stuttering and and saying gibberish whenever I open my mouth.