you best option may be to chop her and deal with the mold and get some good bud out of it, or you can finish it and make hash out of the whole thing as the water will wash away the mold and you still get a harvest, if you harvest early then you still have some good bud if you carefully get rid of the mold, , if the mold is spreading you may lose a harvest unless like i said you make hash or another concentrate.
i would harvest early and cut my loss, we live and grow another day. you will be better prepared next time though