New job offer & 6 weeks pregnant!?!?

Mendy
Hi ladies, 
My husband and I are in the process of moving and I have been applying to jobs for the last few months. All in the same week we found we were pregnant and I received a job offer. I accepted of course but I'm worried about whether or not to hide my bump or to tell them right away?...I have to pass a 3 month probationary period then I'm eligible for benefits so I have been leaning more towards waiting until then..,to let them know. But then my conscious tells me I should just be straight forward..? So confused anyone have suggestions or been in the same boat? Thanks!!