If you had your first LO early, did you have your second, (third, etc.) earlier? later? same time?

My LO was born at 34w4 days and my doctor scared me a bit last week by saying that the goal is basically just to make sure I don't have my second any earlier. I thought the goal was to make it to term but she said that's probably not a reality for me. I've been pretty anxious since she said that so I'm just trying to get some perspective on what others have experienced.