Feeling Overwhelmed in Nursing School

I’ve just started my junior year of nursing school and I am feeling completely overwhelmed, terrified, and honestly depressed. I am a 4.0 student and doing great in my classes, but I’m just feeling completely overwhelmed by the responsibilities nurses have. I feel so lost in the material and I have had numerous mental breakdowns over the past month. I cannot imagine feeling this way for the rest of my life. Does it get better? I just feel so overwhelmed by the realities of nursing and I want to know if, emotionally, it is as draining as it is right now.