Telling potential employers?

I'm moving from Florida to Alabama and there's a shell gas station within walking distance from my new apartment building.. (I don't have a car.) I currently work at a shell station and will be leaving when I finish moving.. I'm planning on going to the new station and applying.. Should I tell them I'm pregnant? When I go up there I'll be 20 weeks.. And I'm showing- though I'm also chubby so it could also look like maybe I drink a lot of beer?