Question for Pregnant Career Ladies! Help!!

Hey all! I have a question for you ladies. My husband and I are a one income household due to my hubbys disability. Luckily, he is going to be a stay at home dad while I go out and make the bacon! I'm currently 18 weeks pregnant and showing. I currently work for a law firm that will only give me part time hours and REALLY need a full time job. I have an interview at an amazing firm on Tuesday and I'm a bit nervous. Obviously by law they cannot ask me if I'm pregnant BUT I think it would be better to just be transparent with them about my pregnancy and my plans to return to work quickly to provide for my family. Do you think I should bring it up during the interview or not? My gut says yes but I don't know if it's a good idea... HELP!