I don't want to scare you. It's just what I went through. I had a lot of success researching online about over supply and overactive letdown. It took a while, but it has slowed down a lot, thankfully.
Clogged ducts, mastitis, my baby had gas, reflux, choking during letdown. I ended up having breast surgery when she was 6 weeks old to clear the clogged ducts. It was a horrible experience.
That's a massive oversupply. If you try to block feed and not pump so much your supply will regulate. I pray you don't run into any of the problems I had from my oversupply.