Pushing traumatized me😭😰

So i gave birth to my son in 2020…. My 1st baby. And i got the epidural and pushed for awhile like 3 hrs off and on… i t really took a toll on me that i felt like not pushing at all anymore because i didn’t have the strength and air and lungs … i needed the oxygen mask. Im getting anxiety and nerves because im current pregnant again and have to do this again 😩 idk why i even got pregnant again… how do i push but feel ok when i push??? Do i do breathing practicing or what? Maybe I wasn’t pushing correctly idk but it hurt my chest tooo…. Im scaredd