Cut it down. Start again. 90% of the beans I bought my first year hermed out like that. Dialed in my room, killed the herms, saved the plants that didn't herm and bred them together... now no herm problems, however, I never lost the habit of constantly checking each and every plant once a week for balls. It's a good habit to get into, you'll catch many more problems and get to know your plants better.
"You are going to have many intersex seeds, and likely not very many non-intersex females in those seeds." Not exactly sure my knowledge is strong enough to really understand that. Will it not produce feminized seeds?