Job interview

I'm 19 weeks pregnant...and I have a job interview Soon for a new job I currently have a decent paying job and not even sure if this one will be a good fit but I desperately want to leave my current job...any who question is should I tell them I'm pregnant at the interview. I know there's a law that says they can't discriminate against pregnancy but of course they wouldn't say that's the reason they deny you.  What should I do. I'm not worried about the work load more so when it's time for Dr appts how will that pan out.