I got a job interview went well and got a second one just waiting on the date

My availability says open available which is what they need. The manager asked if there is any reason why my availability might change, she gets a lot of ppl that decide to go back to school and she can't keep hiring ppl who will no longer be available in a couple months.

I'm 5 months pregnant but you can't tell like at all, since you can't tell I saw no point in telling her can I get fired for that.

I know this bah t the correct group but idk where to post.