how to know when ur nose is fucked?

my nose is stuffy, has some sores on the nostrils and crusty boogers all that fun stuff. haven’t done coke in 4 days and nose is finally cleared up but the sores are still healing and crusty. my nose bleeds when i do coke after a short break because i never really take breaks over a week long. and i do a lot of coke, im talkin fat lines and i usually go on benders for 3-4 days. how should i know when my nose is getting to the point of irreversible damage? what are some signs of your sinuses collapsing?