paak and napaak

I m getting mad nowadays ,all about pak and napak clothes.
I wana ask i left the napak clothes in the corner of my room.after 1 or 2 weeks my husband put the washed clothes beside those napak clothes.1 of my dress was touching that napak cloth ,do i need to wash it again??
Also all the other clothes in the pile need to be washed as they were touching my dress?Does the clothes get napak like this ususally?