Can I breastfeed while I am pregnant?

Yes. Breastfeeding while pregnant isn't ideal but it can be safe if you adjust your diet a little. You will need to add some calories to account for both the baby and the breastfeeding and you will need to be really good about additional water as you can get very dehydrated that way. You should start weaning during your pregnancy as it will be hard to breastfeed both babies.