Has anyone experienced this? I exclusively pump for my almost 3 month old (she was born premature & never had a good latch) and the past few days I've noticed my left breast isn't producing as much as it usually does (about 2 oz less than normal every session). Also, while I'm pumping there will be a sharp pain in it sometimes that hasn't been there before. I keep feeling for lumps or hard spots to make sure I don't have a clogged duct or anything, but I can't find it if I have one ☹️ is this something to be concerned about or is this something that just happens occasionally?