I think it's different for everyone. I just finished my 1st semester of RN school and it stressed me out really bad.
I wasn't use to all the reading, exams, and quizes that they threw at me. And, you HAVE to do well and be prepared at all times. We lost about 15 out of the 70 students just in our first semester.
For me, I had to make nursing school my TOP priority. All through my previous undergrad and during my Nursing pre req's, I NEVER felt stressed like that and did really well. However, we do have students in my program who don't feel overwhelmed and seem to be handeling it well, I'm just not one of them. :)
However, I will start this next semester with a positive attitude and make the best of it.
Just know that however you handle stress, you will have A LOT of reading and test taking to do and you must do well.