I don't produce well, but...(over night pumping)

I discovered that my normal pumping schedule seems to be working against my supply.

Generally I do every 2-3 hours and every 3 at night.

8pm, 11pm, 2am, and 5am my milk supply was about 9-11 oz total for the whole night.

I was tired of waking up that much, so I've been working up to reducing a pump. The last 2 nights I've been doing 8pm, 12:30am, and 5am...I've pumped 18oz both nights!!!! I'm totally shocked! It might be a fluke, but I'm elated at this discovery (and that I can get more sleep!)