Pumping at night

I recently decreased in my milk supply due to a clogged duct. I’ve worked myself into the ground to unclog it and then get my milk back up. It’s been 4 days, and I’m still only getting an ounce, two at most. I’m power pumping, eating lactation bars, heating pad, hot showers at night before pumping. I’m an exclusive pumper. I’m tired. I want to sleep at night, but that just means I’m going to slow the flow down even more. My baby sleeps one 5 hour stretch 10pm-3am and then 4am-8am. If I sleep instead of pump, and my supply goes down, how much do I supplement if I start introducing formula? I don’t want to mess up his digestive system, but I really don’t think I can keep up anymore on my own after 8 weeks. I don’t produce enough.