i am not sure why you had the chicken pox (varicella vaccine). is it possible that you had a shingle vaccine that was called a "chicken pox" vaccine? they are the same herpes virus. it would be good to confirm what you received before getting another one. if you did get a varicella vaccine you can still get the shingles vaccine. for more information on the shingles vaccine: <link>
i'm 63 and had a chickenpox vaccine 3 years ago. should i also get a shingles vaccine?