angry at let-down, won't take soother

[Asparagus78]

So DS2 is 6 m/o (almost 7 m/o) and co-sleeps, as well as nurses all night, which are all great by me, but he's now doing this thing where he gets so angry when the milk lets down while he's trying to comfort nurse. He'll usually wake up every 1-2 hours at night and latch on, actively drink for 10 minutes then slow the suck until he's right out. Except it's taking him longer and longer to go back to sleep, so now there's a second let-down, which infuriates him, and cue the crying until he's so unsettled I have to bounce him back to sleep for at least 20 minutes. Repeat every. hour. Ugh.... Not to mention it wakes up DS1 who also sleeps with us, and he often ends up crying as well. I used to just pop a soother in DS1's mouth when he started doing the same thing, except DS2 will not take a soother (trust me, I've tried every single one out there) and will not suck on my finger. I need a dry breast, and right now, with 2 nurslings, my supply is HUGE! Any ideas? I don't want to nightwean and I don't want to stop co-sleeping. Thanks!