Those of you who successfully breastfed through pregnancy: how did you do it? Did you do anything “special” or different then before? How often did you bf? Did you take anything to help you produce (more) milk?

First, I don't know if this pregnancy sticks...(I'm bleeding, will see ob tomorrow)
DS is almost 10 month old and although he eats a lot he's also a boobaholic. Sometimes he nurses only between solids, sometimes almost every 2 hours (and still eats a lot) and he nurses 2-5 times at night... He is really tall, like his dad
I suffered from HG with DSs pregnancy so I'm a little scared the ob won't let me bf during this pregnancy... But I really don't wanna stop.