Hey Brinaa
I think you'll find that you are the rule rather than the exception at nursing school. The proportion of people doing nursing who haven't studied recently and who are not straight out of high school is very high so what you are feeling is the same that nearly everyone else is.
I remember my first few weeks, I felt exhausted etc and I remember saying to someone how fed up I was and she was like "that's exactly how I'm feeling, I was thinking of quitting". It does get better as you get into a routine.
It is hard but it's worth it if it's what you really want to do.
Good Luck, you're not alone