Jul, if it is feeding time, then direct latch them but I do not do in between, usually it last about 2 hours. So I pump after bb latch and then rest till like an hour then pump again for like 15min on each breast. So when bb wake up for feed again, latch on direct. Like what Tas said, it is alot to do with demand and supply, demand up, suppy go up. And needs lots of soups, milo drinks and fruits, etc. So by end of 2nd week, the supply is established.
At night can wake up and pump too but I only do it 3 hourly. For Kai, he only wakes up once at night like 2-3am, then the next feed is like 5.30am so not that bad for me and also by 2nd month, he slept through.