Slimming down tummy Post pregnancy

Cindy • 25 yo. FTM to a Baby girl. Grace Elena<3
I have been getting advice from my bfs side of the family to wear body shapewear or girdle to help my tummy get back to normal. I know it's a process and that it look 9 months for my baby to grow so that it will obviously take my body time to recover and shrink. I am wondering Though if any of you have used these and if u guys think they made a difference? :)