For relief of your tinnitus, you should try to reduce the amount of caffeine and salt that you consume, or eliminate it altogether. Salt will increase and elevate blood pressure levels and caffeine will stimulate an increase in heart rate. Both of which can increase the tinnitus levels and cause you discomfort.
Although it may not seem like it should help with tinnitus, antidepressants can actually help to reduce the suffering associated with the disease's symptoms. Ask your doctor if he thinks that drugs like benzodiazepines might help you with the problems you're facing, or if there are any counterindications you might have.
Tinnitus is usually caused by excessive exposure to extremely loud sounds, such as machinery or airplanes. There is no need to give your two weeks' notice if you work near one of these noise sources. Just buy some earplugs and wear them to work.
If you have persistent tinnitus, understand that you are not alone and there are lots of others who experience the same problems. Try joining a support group and talk to others about your problem. There are real time support groups in major cities and there are online forums for those who do not have a support group near them.