J.H.
I tried a number of these with my 2nd, as I was having a lot of pelvic pain from about 5 months onward. I tried the one from Motherhood, but found that the very best for me was called Mom-Ez. You can buy them at You & Me Babe or on eBay (what I did, as Y&MB didn't have my size when I needed it.)
Good luck and congrats!!