xiaopang,
yup, if u keep latching bb yr supply will increase to meet their demand. yr bb is the best pump. i never pump out to see how much is the supply, cos wat u can pump out and wat the bb can suck out is very different.
i only fed my girl hourly in the 1st 3 wks or so. after that is mostly at least 1.5hrs. now is abt 2-2.5hr. at night when she's sleeping usually can last at least 2 hrs. by the time she suck finish, burp and go back to sleep is maybe 15-20min has pass. i still hv one hr plus to sleep until the next feeding.
err how i manage ah? just do lor, sleep when bb sleep. wake when bb wake. in fact i find pumping, washing, sterilising, warming bottle and feeding even more tedious. at night when i latch, while she's drinking i can relax and even doze off. when she's done, just burp and put back to bed. dun need to spend extra time pumping and washing up.
anyway i hv an elder 3 yr girl, so maybe i'm used to less sleep already.
if u hv time, u shd read up on this breastfeeding website
www.kellymom.com it addresses many of the concerns u hv.