Everyone is different my friend started wearing maternity clothes at 13weeks amd ididnt have to till almost 6months
With my first pregnancy I didnt have to until about 5 or 6 months.
I couldn't fit in any of my jeans after about 15 _ 16w I only have 2 maternity pants and that's cause they were given to me but I can't fit them yet and I'm 24 w I've settled with only Wearing Sweat pants yoga Pants / shorts and basketball shorts.