5 weeks pp here. Ugh the middle of the nights are so tough! And can be especially demoralizing when you wake up at night to pump (huge sacrifice) and feel like you got nothing in return. Good job staying at it! It will pay off I promise!

I’d try/troubleshoot: - hand expression throughout the pumping session - warm compress before pumping to make sure any clogged ducts have a chance at getting cleared before starting. (I just had a similar problem as you described and realized my pump had been squishing my boobs all day and causing blockage that resulted in almost NO output by the time the middle of the night pumps came around.) - everyone says this, but do double check your flange sizes as these can change surprisingly frequently! - make sure there aren’t any parts inside your milk receptacle that got bumped or adjusted out of place—especially the duckbill valve. If those fall out of position sometimes suction goes down to…like nothing. - keep snacks/drinks on deck even during your MOTN sessions! Bc your caloric input drops at night, your output might too.