I agree with the others, call you physician. I do not know what you can do about the exposure.
FYI Chickenpox is caught like flu: virus floats in the air, from the breath of an infected person.
When it returns it is called shingles. No one can catch shingles, but if you have not had chickenpox and you have skin contact with shingles, you can catch chickenpox.
Take care and gentle hugs.