Finding a new job?

I took on a new job about the same time I got pregnant. It was the worst decision I could have made. I'm doing really well here, and I've already been promoted and I'm up for a raise next month. It is extremely high stressed an I've been interviewing at other places like CRAZY. No one will hire me. I have become so depressed, I've lost ten pounds. My husband is really determined that I find a new job before I quit. My question is, do you tell potential employees in your interview that your pregnant?