It is too early to comment if you are getting it from your husband or if it is within you.
Definitely if your husband smokes the chances of you being affected is there. Chewing pan parag and gutka will affect him and not you.
The skin patches need to be examined by a Dermatologist
and the diagnosis has to be confirmed.
I do not think having sexual intercourse with your husband will affect you in anyways other than spreading a sexually transmitted disease
Hope this helps.