When to disclose pregnancy to new employer

I am currently 22 weeks - I was laid off from previous company at the beginning of March (wasn’t pregnancy related or anything I did or didn’t do). I recently took a new role with another company and have yet to disclose to the office manager upon accepting the job that I am expecting.

Just wondering when would be an ideal time to tell them?! I’m just fearful of potentially losing my job yet again while pregnant.. seeing that Texas is an “at-will state”

Any advice would be appreciated..