Can't Wake Up On Time....

How many weeks pp are you? Are you close to the 12 week mark? Probably you are just exhausted, you poor thing! Could you try pumping at 7pm, then 9pm, then going 4 hours to 1am? That would give you a little longer stretch of sleep. Then you could do 4:30 or 5 instead of 4 to give yourself a little extra, but still do 7. As long as you are getting in the 8 pumps, going 4 hours should be fine--I was told to pump "every 3 to 4 hours" in the beginning, so 4 is still within that time. I would make sure you have 8 pumps and that they aren't more than 4 or 4.5 hrs apart (if you are not past 12 weeks) but not worry so much about even spacing. Get yourself some sleep! I did find that my production was a little better if I wasn't dead tired. Good luck!