Keeping to a pumping schedule??

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Hey everyone! I’m a FTM and 3 weeks pp. I’ve decided to exclusively pump after dealing with latching issues with my little peanut. I’m wondering how you guys stick to a pumping schedule when dealing with a newborn who has a random schedule all of her own. When I can feel my boobs starting to fill up, I know I need to pump but sometimes im dealing with a fussy baby who takes an hour or so to go down. I’m trying to build up my milk supply and I’m having issues sticking to a regiment. Any tips??? 😊