Attention Exclusive Pumpers!

Who all out there is exclusively pumping?! I am currently 4 weeks PP and have been pretty much exclusively pumping since day 1. My baby was in the NICU for 4 weeks and now she’s home! Yay! Her feed plan when we left was I could breast feed three times a day/2neosures/and all the rest expressed milk in a bottle with half nectar to thicken the feeds. She latched great in the hospital and I would do it the two feeds a day I was there for, but now that we’re home she seems agitated by the boob or will be latched and sucking for 16-20 minutes and empty a side and still want her 2 oz bottle so I’ve been exclusively pumping and she has 2 neosure a day until she’s 3 months per doctor orders. I was curious how much y’all are getting?? My supply feels so inferior when I see moms pumping 4oz+ a session. My daily high is 11oz and average per pump is 1.5oz and highest 3oz which keeps up with her for now but I’m worried about when she starts eating more! What can I do to increase my supply? I pump 7-9 times a day, I’m not dieting, I’ve been drinking shakes with oatmeal in them, water, and I’m just dying to see an increase! How much were you making 4 weeks PP and did you start low and it go higher or will I not be able to produce enough? Comment how long you’ve been pumping and how much you make! Thank you!!