the chicken pox virus lays dormant forever!! I didn't think I had chicken pox either but a doctor told me different, I had shingles at age 57, and is derived form the dormant chicken pox virus.
the doctor gave me something for the itch, and it is spreadable as well, so best to stay home for a few days, best to go see a doctor as well.
Now I just read something from here, I thought it was a one time thing! after you have them the first time, you don't have them again. interesting!