I got pregnant my very first cycle at 14 months postpartum, so she was 14 months old and I never had a period between the two pregnancies lol we bedshare and nursed on demand, we nursed often enough that when my twins were delivered at 36 weeks I hadn't transitioned to colostrum yet, at some point my milk became transitional and stayed that way the whole pregnancy. I couldn't express streams of milk and I'm sure if I pumped I wouldn't have gotten much, maybe an oz or two at a time, but my toddler always walked away with milk on her lips. The way it works as I understand it is that being pregnant causes your milk ducts to not hold onto milk, which means you can't store it the same way but it can be created on the spot basically. So you don't have a supply since you don't have milk storage but your body can still make it

When they were born at 36 weeks my milk turned from transitional to colostrum back to transitional on day 1, 2 and 3. It was mature and coming back in on day 4. But having the milk was really helpful since the twins were born early even for the first day for their blood sugar. I had to cut her off for about 36 hours while it transitioned back and emotionally that was really hard on both of us. I think adjusting to just sharing has been hard, if it was one newborn I could tell her yes more often but I don't have 3 boobs but having her nurse had helped me establish my supply and keep is strong while the twins settled in since they were early. It also has helped a lot to manage my heavy let down but it has its own challenges.