Maternity Clothes

At what point do you just decide to get maternity clothes? Right now I am fine with my elastic band clothing or bottoms that stretch along the waist...Im not showing yet, its just due to bloat (only 5 weeks) but Im just curious as to when some of you ladies went to maternity clothes or the bands? Or is there even a time frame? Im going to try to wait as long as possible. Lol