Job interview and 11 weeks pregnant. What to do??

I am 11 weeks pregnant and have a job interview. At the current job I have, I am covered for leave and have a couple of weeks vacation. If I got the offer to start this new job I don't know when I should tell them I am pregnant. I know I legally don't Have to tell them in the interview but I am not a dishonest person and don't feel right about not telling them right away or even after the offer. I would Love to get this New job because I would be making a lot more than my current and it is closer for travel from home. I think that the making more will suffice for losing my leave at my current and It would be worth it to be tight for a couple of months if I had to. I really need it and it is something I have been looking for for a long time. I am torn on what to do because I want them to see me for who I really am working hard and getting the job done beyond their expectations. I have not had any morning sickness and have felt great. Please help!!