I wouldn't recommend it you're not likely to get enough to be reasonably able to freeze it while maintaining separation of it by date. It is perfectly fine to breastfeed while pregnant it's just important to consume enough calories to support both.
Thanks ladies. I waa able to confirm this with my ob as well.
I don't think it's really advised to breast feed while pregnant
What about those who are pregnant again but are still in need of breastfeeding their already-born child at the same time??
Best to leave it alone without pumping or expressing. At this point such may trigger labor and it is still to early for your baby to arrive. Howeever, if you can get a nipple shield you may be able to catch the leaks (if they are enough) and freeze it for later use.
Personally, I would just leave it alone...you could actually send yourself into premature labour doing that...