Paranoid schizophrenia is one of the serious mental illness, one in five person suffer from any form of serious mental illness. Unfortunately, till now we have not been able to find complete cure, but with good biological-psychological-social management, one can go into remission and live a good life.
You need a good psychiatrist and a counselor who work together, with you and your family. You already know what aggravates it, so need to work on those things. Medication really helps, so a good psychiatrist will take care of it. Along with it, take care of your water and food intake. Have regular physical and mental exercise as this helps with stress and recovery.