Next OBGYN appt

Hi there! I'm supposed to go to my next O.B. Appt on 7/22, but everytime I speak with my dr, I feel irresponsible due to me not "asking the right questions"... I haven't had any problems, and am currently 18wk&6days. I just feel like I need to seek information, because I'm so paranoid. What were some questions that you guys asked your OB when coming in for any 2nd trimester appt?Oh an I get to find out what my little one will be by then, so nervousness is all around me for the next few weeks! 18wks belly shot!