Hi, just to share my story here as well.
When i gave birth to my son, I managed to latch on fully for 3 weeks. then I had an episode of blocked ducts. It was so bad that I also went on fours and met my hubby milked me to clear the duct! I even engaged a lactation consultant to come to my place to prick the blister on my nipple and helped to massage. I also put cold cabbage on my breast to relief the engorgement. But i think I over did the cabbage thingy and my supply went down to zero! My son was screaming as he could not get any milk from my breasts. So, I supplemented with FM. meantime, I pump every 1 and half hour - 2 hour to stimulate milk supply. Also took a supplement from Motherlove. It was pure perseverance and one day 9-12 pumps that made my supply went up within i think a week or so. After that, as my son was used to bottle feed, I did exclusive pumping for 1 yr before I decided to stop as I wish to have another child. I had over supply of milk and threw away almost 40litres of bm. wasted. So, it is not impossible to build supply when it went down to zero. Just need to be more determined!
Now, I just gave birth. Baby is 5 days old today but she has been in the hospital for jaundice for 3 nights already. My son had breastmilk jaundice so, for my daughter now, I supplement with fm to help clear the jaundice faster. Usually if you bf for your first child, milk comes in faster for the second child as the network is already thr in the breasts. My milk came in on the 3rd day. So now, my baby is on 3 hourly feed and I bf her 4 feeds of bm thru latch and 4 feeds of fm by the nurse. Hopefully her jaundice comes down and I can bring her home today!
Oh yes, I realise milk volume will be higher if you have a good rest before you pump /latch. Also, if you really want to increase your supply, try not to give up the midnight pump. Apparently, the hormones are at the peak from 3am-5am. so if you pump/latch during this time, your supply will maintain or increase. I realise when i stopped my midnight pump, my yield went down quite significantly.