UWSAs usually overestimate by 10-20 points. I would begin to identify your weaknesses and correct them now before you get too ahead of yourself. If you haven't already done so, start incorporating NBMEs into your schedule, which will allow you to track your progress as you begin to remedy your weaknesses. After all, there are far more NBMEs than UWSAs, and the NBMEs are a little better predictors, particularly the most recent ones. I would save the newest ones for last because those are in fact fairly good predictors.
Good luck!