How to wean a 12 month old?

This kid DOES NOT WANT TO WEAN. I don’t blame him. But I am pregnant again and it’s just time for me to be done. He doesn’t sleep well. And usually requires being nursed to sleep. We have tried the Ferber method, bottles, offering a cup of milk before bed, and even a bit of CIO. He won’t budge. He also is whiney and screams about eeeeeverything all day long. I’m running out of patience and sanity. Please does anyone have ideas?