Anyone breastfeed while pregnant?

Kristi • I'm a stay at home mom to a little boy who's 2 years old. I'm currently pregnant with my second who is due 10/17/16.
I'll be 5 weeks tomorrow and I am still breastfeeding my son at 17 months old. I'm not in any rush to stop breast feeding as long as he is weaned before the new baby comes. I'm nervous on how to handle weaning as he still nurses quite a bit and is very persistent about it. He drinks vitamin d milk too but is a picky eater with table foods. Any pros/cons to bf while pregnant or tips for weaning and getting him to eat better would be great!