I would hold off until after you get the position. They might not claim the reason they aren’t hiring you is because your pregnant but it probably is. It’s so early in you pregnancy too.

I didn't tell my job when I got hired at 4 months pregnant. It wasn't a big deal. I didn't get paid maternity leave but I got 6 weeks off after baby was born. I've been there almost 5 years now.

I wouldn’t tell them let them see the baby bump or if they don’t notice by 6 months tell them. But they don’t have to pay you for maternity leave or keep your job since you haven’t been there a Certain amount of time. At least that’s how it is in California.

Nope by law you don't have to tell them at all Its none of their business and if you do tell them they might not hire you since you will be going on maternity leave at some point