As long as you will be adjusting status to permanent residence on the basis of a bona fide marriage to a US citizen, any prior unauthorized employment will be "forgiven" so that you are ok to disclose any and all prior employment and, in fact, you SHOULD disclose it since you will be signing all those forms under penalty of perjury, indicating that everything is accurate so if you do not disclose, that would be misrepresentation.  But, again, it will NOT count against you that you worked without authorization.