Bottom line: Yes, you can drink coffee while breastfeeding. Caffeine is generally considered safe for breastfeeding people and babies, as long as you follow.
Thus, whole milk can be a part of your diet if your doctor recommends it to you. However, be cautious as pregnancy does not demand an excess of fat. High.
Find out what food and drink you can have and what you should avoid or be careful with during pregnancy, such as some cheeses, meats, fish, eggs, nuts.