hiding bump until I'm telling!

Only just found out at 4 weeks but trying to stay cool as I lost my first pregnancy at 5 weeks and I had a heavy bleed with my son at the same point. I don't want to book in with the midwife until I get past that point and then I'll tell my family and boss but as my tummy muscles are so weak these days I'm sure I'll start showing! How am I best to hide things early on? Tummy control pants?!!! Also I have a work hen weekend in 3 weeks and I don't want it to be too public or overshadow my friends weekend!