Can you switch to skirts and dresses? I am definitely a pants person but for dressy clothes soft skirts and dresses are so much more forgiving for 3rd trimester, and cheaper. Back to pants, all my full panel pants worked best through 3rd trimester. Gap was/is my favorite.
You may be able to find dress pants but I don't know how flattering they will be. My experience is that unless they are perfectly tailored dress pants look aweful. May consider a classy dress or skirt I imagine your options will be limited looking for pants that actually look good Since maternity selection is frustratingly limited.
Kohls.com has nice maternity pants that are almost always on sale. Buy one get one for $1, etc., plus coupons! I bought all 3 colors in the bootcut dress pants. I'm 5'3" and got them in petite and they fit perfect, no tailoring necessary. I love them and wear them daily.
Re: 3rd Trimester Dress Pants - Help!