The same way the rest of us get it. Stress/time. Shingles is actually Chicken Pox, the disease can hide in your nervous system and will spread along nerve lines years later.

I recently got over my case, it took 2-3 weeks. I went to the doctor because of chest pain near my heart. For about a week it felt like someone had hit me with a bat. After that it gradually got better. You may want to stop commuting for a little (if you have a long commute) just so you aren't stuck in an uncomfortable place.