Working in second trimester

I'm 14w and just started a new job today. Should i wait until after training or a few weeks later to tell them I'm pregnant??

It almost slipped today when a co worker came on to me. I would've told him I'm flattered but pregnant.

This job doesn't in any way harm my baby or myself. I'd be in a restaurant like I've worked at for years. This restaurant has a lot of people asking to work here so I'm hesitant to tell them until they see how great of a job I'm doing.