I'm meeting my new boss tomorrow. is it the right time to tell him?

I think my current work place already suspect that I'm pregnant. I haven't been at work for a week (annual leave) and I'm noticing alot of people looking down at my stomach today. Anyway I planned to tell them I'm pregnant a while ago then a position in another store came about. Basically I'm too tired, I am capable of doing my job however they have been dropping me in the deep end with a couple of things. I kinda feel like they are just waiting for me to spill the beans. Also my boyfriend works for the same company and his boss is pestering him for my maternity form. Soo is tomorrow the day I spill the beans? I know he might be pissed off about it, but I didn't want to be overlooked because I'm pregnant. So far all his team love me and have been giving him great feedback about me.