I understand you freaking out. I did it myself. Lots and lots. While we were TTC, when we got our BFP, and then as I approached 32 weeks (when my leak started).
But here's some good news. Grace and I got to 38 weeks, and it probably would have been more, but I had an elective c-section.
And she's 5 months and I've been breastfeeding her the whole time, and we're not looking like stopping!
One thing I would recommend you do - is start taking Elevit now. I kept taking it from when Lucas was born, and the whole way through, my OB said to me that there are studies (one I think I even linked here) showing that folate levels can be linked to premature birth.
Secondly, it's possible to take it easy with a toddler. It just means lots of floor play, and couch play, and when necessary, TV time. If she still does sleep during the day, then it means laying down when she does. If you have a relative in mind who is going to look after her when you go into hospital with the second bubs, start sending her off one afternoon (if possible) a week and use that time to get some rest. Go to bed really, really early, and if there are any evening wake ups or things, get your partner to handle them. It can be done!
Finally, when you get pregnant, book yourself into an ABA breastfeeding class fairly early. Go along, ask lots of questions, watch the videos, read the book they give you. I found all of these things tremendously helpful. I also came here and asked LOTS of questions based on things that had happened last time, and other people's experiences.
When I was in hospital, I asked the lactation consultants for help, since from what I've seen, attachment issues are the hugest issue that tend to end breastfeeding.
Good luck! And we're all hear for you
