Buyer beware... I'm really not loving my Target maternity pants and jeans I bought. They lose shape too easily for my liking and got baggy (felt like I was an old man hiking up my britches every 5 minutes).
Dealt with this my first pregnancy...and target old navy gap only go up to size 18...so if you are unable to shop their straight size normally in store (not sure of your size) looking elsewhere is a must. Motherhood has plus in store to try on, jeans fit ok..I am a size 20 and wore a lot of old navy tops dresses, leggings etc but the size 18 jeans were a no go. Torrid no longer carries maternity which is unfortunate!
It's the brick-and-mortar part that's hard (as I'm sure you have noticed). Your best bet might be to order online from stores with no-hassle return policies and be prepared to send things back if they don't work.
Re: plus size maternity?
Baby #2 Due 3/7/20
Target and Motherhood definitely have plus sizes.