I read if you have inflammation to long from interstitial cycitus it can irritate nerves and lead to chronic pain. how long does that take to happen?

Varies: I hope you're not asking to see if it's okay to ignore this for awhile. It's not. Be careful about selecting a treatment program since some are risky and not legitimate - but an experienced physician will be able to treat this with your cooperation. A Health Psychologist can assist your efforts and minimize the behavioral and emotional problems from and leading to your physical issues. Best!