Hi all. My 4.5mo DS is currently ebf, I'm heading back to work in a month and haven't been able to express anywhere near enough milk so am hoping to bf morning, evening, night and all day/night on the 3 days I'm not working. Does anyone have any recommendations on which formula I should try first? Are any better than others for a previously bf baby? I'm going to start introducing it one feed per day pretty soon so I'll be able to catch and deal with any gut upsets before being at work. TIA