been sittin awhile can break stuff lol...i had a house, noone lived there but thing broke all the time, now i have tennants and nothing breaks...knock on wood...
could be sting stretch moved your nok?
i would judt take it to the shop, make sure draw length is still the same..if its longer, new string time.
since ya cant lower the nok ,maybe raising the rest would help get em back in line