I have a 3.6 overall, 3.7 BSN.
My essay was only about a page and a half, but concise and heartfelt. I deliberately kept it as short as possible, bearing in mind how many of these essays they must read, hoping they would appreciate the brevity with which I was able to present my petition. I think as long as one stays very carefully within the guidelines, the length of one's essay is very much a personal decision that should reflect your most comfortable style and convey your better strengths.
I am a psych nurse and I have reasonably extensive community and volunteer involvement.
I was very nervous about submitting applications as well, but I was in the end accepted to three schools
and had to decide between them. USA, Jefferson and The George Washington. I eliminated Jefferson as it was a Master's program and I prefer to seek a Doctorate of Practice, and although GWU was a very attractive opportunity, in the end it was just a bit too expensive. I think you just have to trust that by your efforts, your will and desire will shine through, and the opportunites you need will come.