Where to get maternity?

I want to buy a nice dress, dress up sort of event dressy, for my baby shower and the only place I see it online and I HATE getting stuff online because I never like it on me. And looks better online. Lol. And hard to judge when pregnant. Target walmart and all sell maternity clothes but not a dress up dress for a baby shower like I want. Advice where to go please?? This is so hard! It’s not like a regular dress.