I try to replace my string every other year but don’t always do it I have had stings and buss cables break on me and normally it is after the release and every thing just kind of falls apart no drastic whipping of the stings or any thing just a sinking feeling in your stomach not knowing if you hurt your bow or not especial the first time it happens (although you are alright they only seem to break the day before the opener) sounds like your string needs to be replaced