I have read that shingles is mostly contagious to people who have not had chickenpox and that you won't get shingles, but chickenpox if you come in contact with the rash/sores and fluid that is draining from the person who has shingles. However, you can’t get shingles itself directly from someone else. It is caused by the chicken pox virus, which has been dormant in your body ever since you had chickenpox. Shingles occurs when the virus that causes chickenpox starts up again in your body.
My mother had a terrible case of shingles. I simply avoided touching the blisters and was around her for a week helping her out.
I agree with calling your doctor to make sure, though.