@rubbersoul I have never been through this, but I have a coworker that got pregnant again 5 or 6 months postpartum. She cut her workload down to part-time with us. She announced her 2nd pregnancy at the height of the baby formula shortage in 2022. Luckily, that cleared up before she gave birth the 2nd time. I don't remember exactly what the issue was, but she was told by her doctors that breastfeeding wasn't a possibility for her.
From what she has shared with me, the beginning was rough, but now her boys (32 months and 16 months) are the best of friends and are on the same schedules. She still has them in daycares and occasionally has her in-laws help when they are visiting.
I guess my advice as an observer to seeing this unfold with her would be to check in with your obgyn about getting your body in the best shape you can for this 2nd baby and mapping out a plan for what you will do about recovery, work, childcare, etc once this baby arrives.
As others have suggested, checking out r/2under2 would probably be helpful.
Wishing you all the best!