Yes. My almost 27 month old is still nursing A LOT! I am ok with this so far, but am nervous about what it will be like if I have morning sickness again. I didn't have a horrible case last time, but felt nauseous for a couple of months on a regular basis. Seems like that would be hard to do while nursing all of the time.
And I hear you about night nursing. My son nurses many times a night. And I'm also worried about what happens when the new baby comes. Are you planning to tandem nurse? I figure I will, but am not sure how it will work -- especially in the middle of the night! Guess we'll figure it out....
I've heard that nursing will sometimes help prevent much morning sickness. So far that doesn't seem to be helping me but maybe you will get lucky.