I too have been exclusively pumping. My son is 8 weeks old and I've been fighting a yeast infection on my nipples. Excrutiating pain when I nurse. Got an RX but isn't going away. I can't stand pumping but agree the benefits of the breast milk outweigh the hassle. We're on a similar schedule. My son takes a 3.5 - 4 oz bottle every three hours except during the night. We feed him if he wakes. Usually his last bottle is around 1030 pm and he usually sleeps until 3 or 4 am. I was able to nurse my older son with no problems but I continued to pump and my husband, who is a SAHD, kept the scheudle you described after I returned to work. Your supply is awesome! I pump about every three hours and only get 4-6 oz, maybe 7 if I'm lucky.