Feeling discourage

I can talk to anyone, so I might as well post it here. I have been stuck at 157 for the last four PTs that I've taken, and I do not know what to do. I want a minimum of 160 as my score to get into my dream school (Loyola in New Orleans). If you have any tips on how to improve RC, PLEASE SHARE THEM WITH ME. My RC is between -11 to -14, and I can't improve it; my LC is -4 to -6 and LG -4 to -7.