My little boy is 6 weeks old and I’m breastfeeding him full time but have been adding in pumping sessions twice a day for the last 2 weeks as a top up night feed. I could only express 1oz in 20min session at first but now it’s 2oz with the most being 2.5oz (in total). Am I doing something wrong? I invested in a madela pump as I thought it would help with expressing more but doesn’t seem to have made much of a difference. Is this normal or do I have a low supply?