Yesterday, 12:58 PM
Your body will prepare for the baby growing inside you just as it would if you were not nursing. So yes, you will have colostrum in your breasts, actually several weeks before you deliver, as is usual. Remember colostrum is made and excreted in very, very small amounts so you may not "see" it, but it will be there for your newborn. You may ALSO continue to make "normal" milk, but actually milk does change during pregnancy, primarily in milk production lessening to some degree and perhaps in taste. Again this has no significance for your newborn, who will get what they need in the amount they need whether you nurse throughput your pregnancy or not. Such changes may change your toddler's nursing behavior while you are pregnant- or may not.
There is really only one resource you need for the situation of nursing when pregnant, (and tandem nursing) and that is the book Adventures in Tandem Nursing. As far as I know, there has been no significant new discoveries in the science of milk production when pregnant since that book was published. I strongly suggest getting that book, which any LLL Group should have for loan if you cannot find it at the Library, and NOT searching the internet on this subject (unless it is a site like LLL or Kellymom devoted to the providing the true facts about breastfeeding.)