Bouncing back after having a baby isn’t easy, and new mom Bekah Martinez wants people to stop saying moms “are lucky to get their pre-baby bods back.” “Lucky is getting the opportunity to carry a child within you,” Martinez, 24, captioned an Instagram photo Tuesday, which shows her breastfeeding her newborn daughter Ruthie Ray. “Lucky is having a healthy baby,” Martinez continued. “Lucky is watching your body change after bringing new life into the world, not squeezing into your old…