If the shopowner is a good one he'll help you out even if you didnt buy the arrows or the bow from him.i personally would lower your draw weight about 5 lbs and practice with it lowered to get your back muscle back into sharp being you haven't shoot much over the year.Pick a spot when you shoot and watch the spot til the arrow hits and most of all relax when you shoot.Your grouping will come back to what you were shooting before with time.